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153 results on '"Mclennan, A."'

1. An olivine cumulate outcrop on the floor of Jezero crater, Mars

Author

Y. Liu, M. M. Tice, M. E. Schmidt, A. H. Treiman, T. V. Kizovski, J. A. Hurowitz, A. C. Allwood, J. Henneke, D. A. K. Pedersen, S. J. VanBommel, Michael W. M. Jones, A L Knight, B. J. Orenstein, B. C. Clark, W. T. Elam, C. M. Heirwegh, T. Barber, L. W. Beegle, K. Benzerara, S Bernard, O. Beyssac, Tanya Bosak, A. J. Brown, E. L. Cardarelli, D. C. Catling, J. R. Christian, E. A. Cloutis, B. A. Cohen, S. Davidoff, A. G. Fairén, K. A. Farley, D. T. Flannery, A. Galvin, J. P. Grotzinger, S. Gupta, James Hall, C. D. K. Herd, K. Hickman-lewis, R. P. Hodyss, B. H. N. Horgan, J. R. Johnson, John Leif Jørgensen, L. C. Kah, J. N. Maki, L. Mandon, N. Mangold, F. M. McCubbin, S. M. McLennan, K. Moore, M. Nachon, P. Nemere, L. D. Nothdurft, J. I. Núñez, Lauren O'Neil, C. M. Quantin-Nataf, V. Sautter, D. L Shuster, K. L. Siebach, J. I. Simon, K. P. Sinclair, K. M. Stack, A. Steele, J. D. Tarnas, N. J. Tosca, K. Uckert, A. Udry, L. A. Wade, B. P. Weiss, R. C. Wiens, K. H. Williford, and M.-P. Zorzano

Subjects
Lunar And Planetary Science And Exploration
Abstract

The geological units on the floor of Jezero crater, Mars, are part of a wider regional stratigraphy of olivine-rich rocks, which extends well beyond the crater. We investigate the petrology of olivine and carbonate-bearing rocks of the Séítah formation in the floor of Jezero. Using multispectral images and x-ray fluorescence data, acquired by the Perseverance rover, we performed a petrographic analysis of the Bastide and Brac outcrops within this unit. We find that these outcrops are composed of igneous rock, moderately altered by aqueous fluid. The igneous rocks are mainly made of coarse-grained olivine, similar to some Martian meteorites. We interpret them as an olivine cumulate, formed by settling and enrichment of olivine through multi-stage cooling of a thick magma body.

Published
2022
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2. Deposition, exhumation, and paleoclimate of an ancient lake deposit, Gale crater, Mars

Author

Grotzinger, JP, Gupta, S, Malin, MC, Rubin, DM, Schieber, J, Siebach, K, Sumner, DY, Stack, KM, Vasavada, AR, Arvidson, RE, Calef, F, Edgar, L, Fischer, WF, Grant, JA, Griffes, J, Kah, LC, Lamb, MP, Lewis, KW, Mangold, N, Minitti, ME, Palucis, M, Rice, M, Williams, RME, Yingst, RA, Blake, D, Blaney, D, Conrad, P, Crisp, J, Dietrich, WE, Dromart, G, Edgett, KS, Ewing, RC, Gellert, R, Hurowitz, JA, Kocurek, G, Mahaffy, P, McBride, MJ, McLennan, SM, Mischna, M, Ming, D, Milliken, R, Newsom, H, Oehler, D, Parker, TJ, Vaniman, D, Wiens, RC, and Wilson, SA

Subjects
Climate, Exhumation, Lakes, Mars, Paleontology, General Science & Technology
Abstract

The landforms of northern Gale crater on Mars expose thick sequences of sedimentary rocks. Based on images obtained by the Curiosity rover, we interpret these outcrops as evidence for past fluvial, deltaic, and lacustrine environments. Degradation of the crater wall and rim probably supplied these sediments, which advanced inward from the wall, infilling both the crater and an internal lake basin to a thickness of at least 75 meters. This intracrater lake system probably existed intermittently for thousands to millions of years, implying a relatively wet climate that supplied moisture to the crater rim and transported sediment via streams into the lake basin. The deposits in Gale crater were then exhumed, probably by wind-driven erosion, creating Aeolis Mons (Mount Sharp).

Published
2015

3. A Habitable Fluvio-Lacustrine Environment at Yellowknife Bay, Gale Crater, Mars

Author

Grotzinger, JP, Sumner, DY, Kah, LC, Stack, K, Gupta, S, Edgar, L, Rubin, D, Lewis, K, Schieber, J, Mangold, N, Milliken, R, Conrad, PG, DesMarais, D, Farmer, J, Siebach, K, Calef, F, Hurowitz, J, McLennan, SM, Ming, D, Vaniman, D, Crisp, J, Vasavada, A, Edgett, KS, Malin, M, Blake, D, Gellert, R, Mahaffy, P, Wiens, RC, Maurice, S, Grant, JA, Wilson, S, Anderson, RC, Beegle, L, Arvidson, R, Hallet, B, Sletten, RS, Rice, M, Bell, J, Griffes, J, Ehlmann, B, Anderson, RB, Bristow, TF, Dietrich, WE, Dromart, G, Eigenbrode, J, Fraeman, A, Hardgrove, C, Herkenhoff, K, Jandura, L, Kocurek, G, Lee, S, Leshin, LA, Leveille, R, Limonadi, D, Maki, J, McCloskey, S, Meyer, M, Minitti, M, Newsom, H, Oehler, D, Okon, A, Palucis, M, Parker, T, Rowland, S, Schmidt, M, Squyres, S, Steele, A, Stolper, E, Summons, R, Treiman, A, Williams, R, Yingst, A, Team, MSL Science, Kemppinen, Osku, Bridges, Nathan, Johnson, Jeffrey R, Cremers, David, Godber, Austin, Wadhwa, Meenakshi, Wellington, Danika, McEwan, Ian, Newman, Claire, Richardson, Mark, Charpentier, Antoine, Peret, Laurent, King, Penelope, Blank, Jennifer, Weigle, Gerald, Li, Shuai, Robertson, Kevin, Sun, Vivian, Baker, Michael, Edwards, Christopher, Farley, Kenneth, Miller, Hayden, Newcombe, Megan, Pilorget, Cedric, Brunet, Claude, Hipkin, Victoria, and Léveillé, Richard

Subjects
Bays, Carbon, Exobiology, Extraterrestrial Environment, Geologic Sediments, Hydrogen, Hydrogen-Ion Concentration, Iron, Mars, Nitrogen, Oxidation-Reduction, Oxygen, Phosphorus, Salinity, Sulfur, Water, MSL Science Team, General Science & Technology
Abstract

The Curiosity rover discovered fine-grained sedimentary rocks, which are inferred to represent an ancient lake and preserve evidence of an environment that would have been suited to support a martian biosphere founded on chemolithoautotrophy. This aqueous environment was characterized by neutral pH, low salinity, and variable redox states of both iron and sulfur species. Carbon, hydrogen, oxygen, sulfur, nitrogen, and phosphorus were measured directly as key biogenic elements; by inference, phosphorus is assumed to have been available. The environment probably had a minimum duration of hundreds to tens of thousands of years. These results highlight the biological viability of fluvial-lacustrine environments in the post-Noachian history of Mars.

Published
2014

4. An olivine cumulate outcrop on the floor of Jezero crater, Mars

Author

Liu, Y, Tice, MM, Schmidt, ME, Treiman, AH, Kizovski, TV, Hurowitz, JA, Allwood, AC, Henneke, J, Pedersen, DAK, VanBommel, SJ, Jones, MWM, Knight, AL, Orenstein, BJ, Clark, BC, Elam, WT, Heirwegh, CM, Barber, T, Beegle, LW, Benzerara, K, Bernard, S, Beyssac, O, Bosak, T, Brown, AJ, Cardarelli, EL, Catling, DC, Christian, Cloutis, EA, Cohen, BA, Davidoff, S, Fairén, AG, Farley, KA, Flannery, DT, Galvin, A, Grotzinger, JP, Gupta, S, Hall, J, Herd, CDK, Hickman-Lewis, K, Hodyss, RP, Horgan, BHN, Johnson, Jørgensen, JL, Kah, LC, Maki, JN, Mandon, L, Mangold, N, McCubbin, FM, McLennan, SM, Moore, K, Nachon, M, Nemere, P, Nothdurft, LD, Núñez, JI, O'Neil, L, Quantin-Nataf, CM, Sautter, V, Shuster, DL, Siebach, KL, Simon, JI, Sinclair, KP, Stack, KM, Steele, A, Tarnas, JD, Tosca, NJ, Uckert, K, Udry, A, Wade, LA, Weiss, BP, Wiens, RC, Williford, KH, Zorzano, M-P, Mangold, Nicolas, Cosmochimie [IMPMC] (IMPMC_COSMO), Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC), Muséum national d'Histoire naturelle (MNHN)-Institut de recherche pour le développement [IRD] : UR206-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Institut de recherche pour le développement [IRD] : UR206-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Planétologie et Géosciences [UMR_C 6112] (LPG), Université d'Angers (UA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST), Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ), Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement (LGL-TPE), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS), Liu, Y [0000-0003-0308-0942], Tice, MM [0000-0003-2560-1702], Schmidt, ME [0000-0003-4793-7899], Treiman, AH [0000-0002-8073-2839], Kizovski, TV [0000-0001-8188-9769], Hurowitz, JA [0000-0002-5857-8652], Henneke, J [0000-0002-3195-7417], Pedersen, DAK [0000-0001-7182-8567], VanBommel, SJ [0000-0002-6565-0827], Jones, MWM [0000-0002-0720-8715], Knight, AL [0000-0001-6832-8190], Orenstein, BJ [0000-0002-6586-4227], Clark, BC [0000-0002-5546-8757], Beegle, LW [0000-0002-4944-4353], Benzerara, K [0000-0002-0553-0137], Bernard, S [0000-0001-5576-7020], Beyssac, O [0000-0001-8879-4762], Bosak, T [0000-0001-5179-5323], Brown, AJ [0000-0002-9352-6989], Cardarelli, EL [0000-0001-5451-2309], Catling, DC [0000-0001-5646-120X], Christian, JR [0000-0003-4646-2852], Cloutis, EA [0000-0001-7301-0929], Cohen, BA [0000-0001-5896-5903], Davidoff, S [0000-0002-4417-7268], Fairén, AG [0000-0002-2938-6010], Flannery, DT [0000-0001-8982-496X], Grotzinger, JP [0000-0001-9324-1257], Gupta, S [0000-0001-6415-1332], Hall, J [0000-0003-0884-3777], Herd, CDK [0000-0001-5210-4002], Hickman-Lewis, K [0000-0001-8014-233X], Hodyss, RP [0000-0002-6523-3660], Horgan, BHN [0000-0001-6314-9724], Johnson, JR [0000-0002-5586-4901], Jørgensen, JL [0000-0002-0343-239X], Kah, LC [0000-0001-7172-2033], Maki, JN [0000-0002-7887-0343], Mandon, L [0000-0002-9310-0742], Mangold, N [0000-0002-0022-0631], McCubbin, FM [0000-0002-2101-4431], McLennan, SM [0000-0003-4259-7178], Nachon, M [0000-0003-0417-7076], Nothdurft, LD [0000-0001-9646-9070], Núñez, JI [0000-0003-0930-6674], O'Neil, L [0000-0003-1555-8229], Quantin-Nataf, CM [0000-0002-8313-8595], Shuster, DL [0000-0003-2507-9977], Siebach, KL [0000-0002-6628-6297], Simon, JI [0000-0002-3969-8958], Sinclair, KP [0000-0001-6261-4591], Stack, KM [0000-0003-3444-6695], Steele, A [0000-0001-9643-2841], Tarnas, JD [0000-0002-6256-0826], Tosca, NJ [0000-0003-4415-4231], Uckert, K [0000-0002-0859-5526], Udry, A [0000-0002-0074-8110], Wade, LA [0000-0001-8254-8181], Weiss, BP [0000-0003-3113-3415], Wiens, RC [0000-0002-3409-7344], Zorzano, M-P [0000-0002-4492-9650], and Apollo - University of Cambridge Repository

Subjects
[SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology, Multidisciplinary, 5101 Astronomical Sciences, 37 Earth Sciences, 3705 Geology, 5109 Space Sciences, [SDU.STU.PL] Sciences of the Universe [physics]/Earth Sciences/Planetology, 51 Physical Sciences, 3703 Geochemistry
Abstract

International audience; The geological units on the floor of Jezero crater, Mars, are part of a wider regional stratigraphy of olivine-rich rocks, which extends well beyond the crater. We investigate the petrology of olivine and carbonate-bearing rocks of the Séítah formation in the floor of Jezero. Using multispectral images and x-ray fluorescence data, acquired by the Perseverance rover, we performed a petrographic analysis of the Bastide and Brac outcrops within this unit. We find that these outcrops are composed of igneous rock, moderately altered by aqueous fluid. The igneous rocks are mainly made of coarse-grained olivine, similar to some Martian meteorites. We interpret them as an olivine cumulate, formed by settling and enrichment of olivine through multi-stage cooling of a thick magma body.

Published
2022

5. Two Years at Meridiani Planum: Results from the Opportunity Rover

Author

Squyres, S. W., Knoll, A. H., Arvidson, R. E., Clark, B. C., Grotzinger, J. P., Jolliff, B. L., McLennan, S. M., Tosca, N., Bell, J. F., Calvin, W. M., Farrand, W. H., Glotch, T. D., Golombek, M. P., Herkenhoff, K. E., Johnson, J. R., Klingelhöfer, G., McSween, H. Y., and Yen, A. S.

Published
2006

6. Soils of Eagle Crater and Meridiani Planum at the Opportunity Rover Landing Site

Author

Soderblom, L. A., Anderson, R. C., Arvidson, R. E., Bell, J. F., Cabrol, N. A., Calvin, W., Christensen, P. R., Clark, B. C., Economou, T., Ehlmann, B. L., Farrand, W. H., Fike, D., Gellert, R., Glotch, T. D., Golombek, M. P., Greeley, R., Grotzinger, J. P., Herkenhoff, K. E., Jerolmack, D. J., Johnson, J. R., Jolliff, B., Klingelhöfer, G., Knoll, A. H., Learner, Z. A., Li, R., Malin, M. C., McLennan, S. M., McSween, H. Y., Ming, D. W., Morris, R. V., Rice, J. W., Richter, L., Rieder, R., Rodionov, D., Schröder, C., Seelos, F. P., Soderblom, J. M., Squyres, S. W., Sullivan, R., Watters, W. A., Weitz, C. M., Wyatt, M. B., Yen, A., and Zipfel, J.

Published
2004

7. The Opportunity Rover's Athena Science Investigation at Meridiani Planum, Mars

Author

Squyres, S. W., Arvidson, R. E., Bell, J. F., Brückner, J., Cabrol, N. A., Calvin, W., Carr, M. H., Christensen, P. R., Clark, B. C., Crumpler, L., d'Uston, C., Economou, T., Farmer, J., Farrand, W., Folkner, W., Golombek, M., Gorevan, S., Grant, J. A., Greeley, R., Grotzinger, J., Haskin, L., Herkenhoff, K. E., Hviid, S., Johnson, J., Klingelhöfer, G., Knoll, A. H., Landis, G., Lemmon, M., Li, R., Madsen, M. B., Malin, M. C., McLennan, S. M., McSween, H. Y., Ming, D. W., Moersch, J., Morris, R. V., Parker, T., Rice, J. W., Richter, L., Rieder, R., Sims, M., Smith, M., Smith, P., Soderblom, L. A., Sullivan, R., Wänke, H., Wdowiak, T., Wolff, M., and Yen, A.

Published
2004

8. In Situ Evidence for an Ancient Aqueous Environment at Meridiani Planum, Mars

Author

Squyres, S. W., Grotzinger, J. P., Arvidson, R. E., Bell, J. F., Calvin, W., Christensen, P. R., Clark, B. C., Crisp, J. A., Farrand, W. H., Herkenhoff, K. E., Johnson, J. R., Klingelhöfer, G., Knoll, A. H., McLennan, S. M., McSween, H. Y., Morris, R. V., Rice, J. W., Rieder, R., and Soderblom, L. A.

Published
2004

9. Evidence from Opportunity's Microscopic Imager for Water on Meridiani Planum

Author

Herkenhoff, K. E., Squyres, S. W., Arvidson, R., Bass, D. S., Bell, J. F., Bertelsen, P., Ehlmann, B. L., Farrand, W., Gaddis, L., Greeley, R., Grotzinger, J., Hayes, A. G., Hviid, S. F., Johnson, J. R., Jolliff, B., Kinch, K. M., Knoll, A. H., Madsen, M. B., Maki, J. N., McLennan, S. M., McSween, H. Y., Ming, D. W., Rice, J. W., Richter, L., Sims, M., Smith, P. H., Soderblom, L. A., Spanovich, N., Sullivan, R., Thompson, S., Wdowiak, T., Weitz, C., and Whelley, P.

Published
2004

10. Pancam Multispectral Imaging Results from the Opportunity Rover at Meridiani Planum

Author

Bell, J. F., Squyres, S. W., Arvidson, R. E., Arneson, H. M., Bass, D., Calvin, W., Farrand, W. H., Goetz, W., Golombek, M., Greeley, R., Grotzinger, J., Guinness, E., Hayes, A. G., Hubbard, M. Y. H., Herkenhoff, K. E., Johnson, M. J., Johnson, J. R., Joseph, J., Kinch, K. M., Lemmon, M. T., Li, R., Madsen, M. B., Maki, J. N., Malin, M., McCartney, E., McLennan, S., McSween, H. Y., Ming, D. W., Morris, R. V., Parker, T. J., Proton, J., Rice, J. W., Seelos, F., Soderblom, J. M., Soderblom, L. A., Sohl-Dickstein, J. N., Sullivan, R. J., Weitz, C. M., and Wolff, M. J.

Published
2004

11. Basaltic Rocks Analyzed by the Spirit Rover in Gusev Crater

Author

McSween, H. Y., Arvidson, R. E., Bell, J. F., Blaney, D., Cabrol, N. A., Christensen, P. R., Clark, B. C., Crisp, J. A., Crumpler, L. S., Farmer, J. D., Gellert, R., Ghosh, A., Gorevan, S., Graff, T., Grant, J., Haskin, L. A., Herkenhoff, K. E., Johnson, J. R., Jolliff, B. L., Klingelhoefer, G., Knudson, A. T., McLennan, S., Milam, K. A., Moersch, J. E., Morris, R. V., Rieder, R., Ruff, S. W., de Souza, P. A., Squyres, S. W., Wänke, H., Wang, A., Wyatt, M. B., Yen, A., and Zipfel, J.

Published
2004

12. Wind-Related Processes Detected by the Spirit Rover at Gusev Crater, Mars

Author

Greeley, R., Squyres, S. W., Arvidson, R. E., Bartlett, P., Bell, J. F., Blaney, D., Cabrol, N. A., Farmer, J., Farrand, B., Golombek, M. P., Gorevan, S. P., Grant, J. A., Haldemann, A. F. C., Herkenhoff, K. E., Johnson, J., Landis, G., Madsen, M. B., McLennan, S. M., Moersch, J., Rice, J. W., Richter, L., Ruff, S., Sullivan, R. J., Thompson, S. D., Wang, A., Weitz, C. M., and Whelley, P.

Published
2004

13. The Spirit Rover's Athena Science Investigation at Gusev Crater, Mars

Author

Squyres, S. W., Arvidson, R. E., Bell, J. F., Brückner, J., Cabrol, N. A., Calvin, W., Carr, M. H., Christensen, P. R., Clark, B. C., Crumpler, L., d'Uston, C., Economou, T., Farmer, J., Farrand, W., Folkner, W., Golombek, M., Gorevan, S., Grant, J. A., Greeley, R., Grotzinger, J., Haskin, L., Herkenhoff, K. E., Hviid, S., Johnson, J., Klingelhöfer, G., Knoll, A., Landis, G., Lemmon, M., Li, R., Madsen, M. B., Malin, M. C., McLennan, S. M., McSween, H. Y., Ming, D. W., Moersch, J., Morris, R. V., Parker, T., Rice, J. W., Richter, L., Rieder, R., Sims, M., Smith, M., Smith, P., Soderblom, L. A., Sullivan, R., Wänke, H., Wdowiak, T., Wolff, M., and Yen, A.

Published
2004

14. Pancam Multispectral Imaging Results from the Spirit Rover at Gusev Crater

Author

Bell, J. F., Squyres, S. W., Arvidson, R. E., Arneson, H. M., Bass, D., Blaney, D., Cabrol, N., Calvin, W., Farmer, J., Farrand, W. H., Goetz, W., Golombek, M., Grant, J. A., Greeley, R., Guinness, E., Hayes, A. G., Hubbard, M. Y. H., Herkenhoff, K. E., Johnson, M. J., Johnson, J. R., Joseph, J., Kinch, K. M., Lemmon, M. T., Li, R., Madsen, M. B., Maki, J. N., Malin, M., McCartney, E., McLennan, S., McSween, H. Y., Ming, D. W., Moersch, J. E., Morris, R. V., Parker, T. J., Proton, J., Rice, J. W., Seelos, F., Soderblom, J., Soderblom, L. A., Sohl-Dickstein, J. N., Sullivan, R. J., Wolff, M. J., and Wang, A.

Published
2004

15. Redox stratification of an ancient lake in Gale crater, Mars

Author

Hurowitz, J. A., Grotzinger, J. P., Fischer, W. W., McLennan, S. M., Milliken, R. E., Stein, N., Vasavada, A. R., Blake, D. F., Dehouck, E., Eigenbrode, J. L., Fairén, A. G., Frydenvang, J., Gellert, R., Grant, J. A., Gupta, S., Herkenhoff, K. E., Ming, D. W., Rampe, E. B., Schmidt, M. E., Siebach, K. L., Stack-Morgan, K., Sumner, D. Y., and Wiens, R. C.

Published
2017

16. Textures of the Soils and Rocks at Gusev Crater from Spirit's Microscopic Imager

Author

Herkenhoff, K. E., Squyres, S. W., Arvidson, R., Bass, D. S., Bell, J. F., Bertelsen, P., Cabrol, N. A., Gaddis, L., Hayes, A. G., Hviid, S. F., Johnson, J. R., Kinch, K. M., Madsen, M. B., Maki, J. N., McLennan, S. M., McSween, H. Y., Rice, J. W., Sims, M., Smith, P. H., Soderblom, L. A., Spanovich, N., Sullivan, R., and Wang, A.

Published
2004

17. Surface waves and crustal structure on Mars

Author

Kim, D., primary, Banerdt, W. B., additional, Ceylan, S., additional, Giardini, D., additional, Lekić, V., additional, Lognonné, P., additional, Beghein, C., additional, Beucler, É., additional, Carrasco, S., additional, Charalambous, C., additional, Clinton, J., additional, Drilleau, M., additional, Durán, C., additional, Golombek, M., additional, Joshi, R., additional, Khan, A., additional, Knapmeyer-Endrun, B., additional, Li, J., additional, Maguire, R., additional, Pike, W. T., additional, Samuel, H., additional, Schimmel, M., additional, Schmerr, N. C., additional, Stähler, S. C., additional, Stutzmann, E., additional, Wieczorek, M., additional, Xu, Z., additional, Batov, A., additional, Bozdag, E., additional, Dahmen, N., additional, Davis, P., additional, Gudkova, T., additional, Horleston, A., additional, Huang, Q., additional, Kawamura, T., additional, King, S. D., additional, McLennan, S. M., additional, Nimmo, F., additional, Plasman, M., additional, Plesa, A. C., additional, Stepanova, I. E., additional, Weidner, E., additional, Zenhäusern, G., additional, Daubar, I. J., additional, Fernando, B., additional, Garcia, R. F., additional, Posiolova, L. V., additional, and Panning, M. P., additional

Published
2022
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18. Aqueously altered igneous rocks sampled on the floor of Jezero crater, Mars

Author

Farley, K. A., primary, Stack, K. M., additional, Shuster, D. L., additional, Horgan, B. H. N., additional, Hurowitz, J. A., additional, Tarnas, J. D., additional, Simon, J. I., additional, Sun, V. Z., additional, Scheller, E. L., additional, Moore, K. R., additional, McLennan, S. M., additional, Vasconcelos, P. M., additional, Wiens, R. C., additional, Treiman, A. H., additional, Mayhew, L. E., additional, Beyssac, O., additional, Kizovski, T. V., additional, Tosca, N. J., additional, Williford, K. H., additional, Crumpler, L. S., additional, Beegle, L. W., additional, Bell, J. F., additional, Ehlmann, B. L., additional, Liu, Y., additional, Maki, J. N., additional, Schmidt, M. E., additional, Allwood, A. C., additional, Amundsen, H. E. F., additional, Bhartia, R., additional, Bosak, T., additional, Brown, A. J., additional, Clark, B. C., additional, Cousin, A., additional, Forni, O., additional, Gabriel, T. S. J., additional, Goreva, Y., additional, Gupta, S., additional, Hamran, S.-E., additional, Herd, C. D. K., additional, Hickman-Lewis, K., additional, Johnson, J. R., additional, Kah, L. C., additional, Kelemen, P. B., additional, Kinch, K. B., additional, Mandon, L., additional, Mangold, N., additional, Quantin-Nataf, C., additional, Rice, M. S., additional, Russell, P. S., additional, Sharma, S., additional, Siljeström, S., additional, Steele, A., additional, Sullivan, R., additional, Wadhwa, M., additional, Weiss, B. P., additional, Williams, A. J., additional, Wogsland, B. V., additional, Willis, P. A., additional, Acosta-Maeda, T. A., additional, Beck, P., additional, Benzerara, K., additional, Bernard, S., additional, Burton, A. S., additional, Cardarelli, E. L., additional, Chide, B., additional, Clavé, E., additional, Cloutis, E. A., additional, Cohen, B. A., additional, Czaja, A. D., additional, Debaille, V., additional, Dehouck, E., additional, Fairén, A. G., additional, Flannery, D. T., additional, Fleron, S. Z., additional, Fouchet, T., additional, Frydenvang, J., additional, Garczynski, B. J., additional, Gibbons, E. F., additional, Hausrath, E. M., additional, Hayes, A. G., additional, Henneke, J., additional, Jørgensen, J. L., additional, Kelly, E. M., additional, Lasue, J., additional, Le Mouélic, S., additional, Madariaga, J. M., additional, Maurice, S., additional, Merusi, M., additional, Meslin, P.-Y., additional, Milkovich, S. M., additional, Million, C. C., additional, Moeller, R. C., additional, Núñez, J. I., additional, Ollila, A. M., additional, Paar, G., additional, Paige, D. A., additional, Pedersen, D. A. K., additional, Pilleri, P., additional, Pilorget, C., additional, Pinet, P. C., additional, Rice, J. W., additional, Royer, C., additional, Sautter, V., additional, Schulte, M., additional, Sephton, M. A., additional, Sharma, S. K., additional, Sholes, S. F., additional, Spanovich, N., additional, St. Clair, M., additional, Tate, C. D., additional, Uckert, K., additional, VanBommel, S. J., additional, Yanchilina, A. G., additional, and Zorzano, M.-P., additional

Published
2022
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19. Fear beyond predators

Author

Hockings, Kimberley J., McLennan, Matthew R., and Hill, Catherine

Published
2014

20. Mineralogy of a Mudstone at Yellowknife Bay, Gale Crater, Mars

Author

MSL Science Team, Vaniman, D. T., Bish, D. L., Ming, D. W., Bristow, T. F., Morris, R. V., Blake, D. F., Chipera, S. J., Morrison, S. M., Treiman, A. H., Rampe, E. B., Rice, M., Achilles, C. N., Grotzinger, J. P., McLennan, S. M., Williams, J., Bell, J. F., Newsom, H. E., Downs, R. T., Maurice, S., Sarrazin, P., Yen, A. S., Morookian, J. M., Farmer, J. D., Stack, K., Milliken, R. E., Ehlmann, B. L., Sumner, D. Y., Berger, G., Crisp, J. A., Hurowitz, J. A., Anderson, R., Des Marais, D. J., Stolper, E. M., Edgett, K. S., Gupta, S., and Spanovich, N.

Published
2014

21. Ancient Aqueous Environments at Endeavour Crater, Mars

Author

Arvidson, R. E., Squyres, S. W., Bell, J. F., Catalano, J. G., Clark, B. C., Crumpler, L. S., de Souza, P. A., Fairén, A. G., Farrand, W. H., Fox, V. K., Gellert, R., Ghosh, A., Golombek, M. P., Grotzinger, J. P., Guinness, E. A., Herkenhoff, K. E., Jolliff, B. L., Knoll, A. H., Li, R., McLennan, S. M., Ming, D. W., Mittlefehldt, D. W., Moore, J. M., Morris, R. V., Murchie, S. L., Parker, T. J., Paulsen, G., Rice, J. W., Ruff, S. W., Smith, M. D., and Wolff, M. J.

Published
2014

22. In Situ Radiometric and Exposure Age Dating of the Martian Surface

Author

MSL Science Team, Farley, K. A., Malespin, C., Mahaffy, P., Grotzinger, J. P., Vasconcelos, P. M., Milliken, R. E., Malin, M., Edgett, K. S., Pavlov, A. A., Hurowitz, J. A., Grant, J. A., Miller, H. B., Arvidson, R., Beegle, L., Calef, F., Conrad, P. G., Dietrich, W. E., Eigenbrode, J., Gellert, R., Gupta, S., Hamilton, V., Hassler, D. M., Lewis, K. W., McLennan, S. M., Ming, D., Navarro-González, R., Schwenzer, S. P., Steele, A., Stolper, E. M., Sumner, D. Y., Vaniman, D., Vasavada, A., Williford, K., and Wimmer-Schweingruber, R. F.

Published
2014

23. Elemental Geochemistry of Sedimentary Rocks at Yellowknife Bay, Gale Crater, Mars

Author

MSL Science Team, McLennan, S. M., Anderson, R. B., Bell, J. F., Bridges, J. C., Calef, F., Campbell, J. L., Clark, B. C., Clegg, S., Conrad, P., Cousin, A., Des Marais, D. J., Dromart, G., Dyar, M. D., Edgar, L. A., Ehlmann, B. L., Fabre, C., Forni, O., Gasnault, O., Gellert, R., Gordon, S., Grant, J. A., Grotzinger, J. P., Gupta, S., Herkenhoff, K. E., Hurowitz, J. A., King, P. L., Le Mouélic, S., Leshin, L. A., Léveillé, R., Lewis, K. W., Mangold, N., Maurice, S., Ming, D. W., Morris, R. V., Nachon, M., Newsom, H. E., Ollila, A. M., Perrett, G. M., Rice, M. S., Schmidt, M. E., Schwenzer, S. P., Stack, K., Stolper, E. M., Sumner, D. Y., Treiman, A. H., VanBommel, S., Vaniman, D. T., Vasavada, A., Wiens, R. C., and Yingst, R. A.

Published
2014

24. Volatile and Organic Compositions of Sedimentary Rocks in Yellowknife Bay, Gale Crater, Mars

Author

MSL Science Team, Ming, D. W., Archer, P. D., Glavin, D. P., Eigenbrode, J. L., Franz, H. B., Sutter, B., Brunner, A. E., Stern, J. C., Freissinet, C., McAdam, A. C., Mahaffy, P. R., Cabane, M., Coll, P., Campbell, J. L., Atreya, S. K., Niles, P. B., Bell, J. F., Bish, D. L., Brinckerhoff, W. B., Buch, A., Conrad, P. G., Des Marais, D. J., Ehlmann, B. L., Fairén, A. G., Farley, K., Flesch, G. J., Francois, P., Gellert, R., Grant, J. A., Grotzinger, J. P., Gupta, S., Herkenhoff, K. E., Hurowitz, J. A., Leshin, L. A., Lewis, K. W., McLennan, S. M., Miller, K. E., Moersch, J., Morris, R. V., Navarro-González, R., Pavlov, A. A., Perrett, G. M., Pradler, I., Squyres, S. W., Summons, R. E., Steele, A., Stolper, E. M., Sumner, D. Y., Szopa, C., Teinturier, S., Trainer, M. G., Treiman, A. H., Vaniman, D. T., Vasavada, A. R., Webster, C. R., Wray, J. J., and Yingst, R. A.

Published
2014

25. A Habitable Fluvio-Lacustrine Environment at Yellowknife Bay, Gale Crater, Mars

Author

MSL Science Team, Grotzinger, J. P., Sumner, D. Y., Kah, L. C., Stack, K., Gupta, S., Edgar, L., Rubin, D., Lewis, K., Schieber, J., Mangold, N., Milliken, R., Conrad, P. G., DesMarais, D., Farmer, J., Siebach, K., Calef, F., Hurowitz, J., McLennan, S. M., Ming, D., Vaniman, D., Crisp, J., Vasavada, A., Edgett, K. S., Malin, M., Blake, D., Gellert, R., Mahaffy, P., Wiens, R. C., Maurice, S., Grant, J. A., Wilson, S., Anderson, R. C., Beegle, L., Arvidson, R., Hallet, B., Sletten, R. S., Rice, M., Bell, J., Griffes, J., Ehlmann, B., Anderson, R. B., Bristow, T. F., Dietrich, W. E., Dromart, G., Eigenbrode, J., Fraeman, A., Hardgrove, C., Herkenhoff, K., Jandura, L., Kocurek, G., Lee, S., Leshin, L. A., Leveille, R., Limonadi, D., Maki, J., McCloskey, S., Meyer, M., Minitti, M., Newsom, H., Oehler, D., Okon, A., Palucis, M., Parker, T., Rowland, S., Schmidt, M., Squyres, S., Steele, A., Stolper, E., Summons, R., Treiman, A., Williams, R., and Yingst, A.

Published
2014

26. Curiosity at Gale Crater, Mars: Characterization and Analysis of the Rocknest Sand Shadow

Author

Blake, D. F., Morris, R. V., Kocurek, G., Morrison, S. M., Downs, R. T., Bish, D., Ming, D. W., Edgett, K. S., Rubin, D., Goetz, W., Madsen, M. B., Sullivan, R., Gellert, R., Campbell, I., Treiman, A. H., McLennan, S. M., Yen, A. S., Grotzinger, J., Vaniman, D. T., Chipera, S. J., Achilles, C. N., Rampe, E. B., Sumner, D., Meslin, P.-Y., Maurice, S., Forni, O., Gasnault, O., Fisk, M., Schmidt, M., Mahaffy, P., Leshin, L. A., Glavin, D., Steele, A., Freissinet, C., Navarro-González, R., Yingst, R. A., Kah, L. C., Bridges, N., Lewis, K. W., Bristow, T. F., Farmer, J. D., Crisp, J. A., Stolper, E. M., Des Marais, D. J., and Sarrazin, P.

Published
2013
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27. The Petrochemistry of Jake_M: A Martian Mugearite

Author

Stolper, E. M., Baker, M. B., Newcombe, M. E., Schmidt, M. E., Treiman, A. H., Cousin, A., Dyar, M. D., Fisk, M. R., Gellert, R., King, P. L., Leshin, L., Maurice, S., McLennan, S. M., Minitti, M. E., Perrett, G., Rowland, S., Sautter, V., and Wiens, R. C.

Published
2013
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28. Ancient Impact and Aqueous Processes at Endeavour Crater, Mars

Author

Squyres, S. W., Arvidson, R. E., Bell, J. F., Calef, F., Clark, B. C., Cohen, B. A., Crumpler, L. A., de Souza, P. A., Farrand, W. H., Gellert, R., Grant, J., Herkenhoff, K. E., Hurowitz, J. A., Johnson, J. R., Jolliff, B. L., Knoll, A. H., Li, R., McLennan, S. M., Ming, D. W., Mittlefehldt, D. W., Parker, T. J., Paulsen, G., Rice, M. S., Ruff, S. W., Schröder, C., Yen, A. S., and Zacny, K.

Published
2012
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29. Exploration of Victoria Crater by the Mars Rover Opportunity

Author

Squyres, S. W., Knoll, A. H., Arvidson, R. E., Ashley, J. W., Bell, J. F., Calvin, W. M., Christensen, P. R., Clark, B. C., Cohen, B. A., de Souza, P. A., Edgar, L., Farrand, W. H., Fleischer, I., Gellert, R., Golombek, M. P., Grant, J., Grotzinger, J., Hayes, A., Herkenhoff, K. E., Johnson, J. R., Jolliff, B., Klingelhöfer, G., Knudson, A., Li, R., McCoy, T. J., McLennan, S. M., Ming, D. W., Mittlefehldt, D. W., Morris, R. V., Rice, J. W., Schröder, C., Sullivan, R. J., Yen, A., and Yingst, R. A.

Published
2009
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31. Detection of Silica-Rich Deposits on Mars

Author

Squyres, S. W., Arvidson, R. E., Ruff, S., Gellert, R., Morris, R. V., Ming, D. W., Crumpler, L., Farmer, J. D., Des Marais, D. J., Yen, A., McLennan, S. M., Calvin, W., Bell, J. F., Clark, B. C., Wang, A., McCoy, T. J., Schmidt, M. E., and de Souza, P. A.

Published
2008
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32. Perseverance rover reveals an ancient delta-lake system and flood deposits at Jezero crater, Mars

Author

Mangold, N., primary, Gupta, S., additional, Gasnault, O., additional, Dromart, G., additional, Tarnas, J. D., additional, Sholes, S. F., additional, Horgan, B., additional, Quantin-Nataf, C., additional, Brown, A. J., additional, Le Mouélic, S., additional, Yingst, R. A., additional, Bell, J. F., additional, Beyssac, O., additional, Bosak, T., additional, Calef, F., additional, Ehlmann, B. L., additional, Farley, K. A., additional, Grotzinger, J. P., additional, Hickman-Lewis, K., additional, Holm-Alwmark, S., additional, Kah, L. C., additional, Martinez-Frias, J., additional, McLennan, S. M., additional, Maurice, S., additional, Nuñez, J. I., additional, Ollila, A. M., additional, Pilleri, P., additional, Rice, J. W., additional, Rice, M., additional, Simon, J. I., additional, Shuster, D. L., additional, Stack, K. M., additional, Sun, V. Z., additional, Treiman, A. H., additional, Weiss, B. P., additional, Wiens, R. C., additional, Williams, A. J., additional, Williams, N. R., additional, and Williford, K. H., additional

Published
2021
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33. MARTIAN GEOLOGY: Deposition, exhumation, and paleoclimate of an ancient lake deposit, Gale crater, Mars

Author

Grotzinger, J. P., Gupta, S., Malin, M. C., Rubin, D. M., Schieber, J., Siebach, K., Sumner, D. Y., Stack, K. M., Vasavada, A. R., Arvidson, R. E., III, Calef F., Edgar, L., Fischer, W. F., Grant, J. A., Griffes, J., Kah, L. C., Lamb, M. P., Lewis, K. W., Mangold, N., Minitti, M. E., Palucis, M., Rice, M., Williams, R. M. E., Yingst, R. A., Blake, D., Blaney, D., Conrad, P., Crisp, J., Dietrich, W. E., Dromart, G., Edgett, K. S., Ewing, R. C., Gellert, R., Hurowitz, J. A., Kocurek, G., Mahaffy, P., McBride, M. J., McLennan, S. M., Mischna, M., Ming, D., Milliken, R., Newsom, H., Oehler, D., Parker, T. J., Vaniman, D., Wiens, R. C., and Wilson, S. A.

Published
2015
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36. Upper mantle structure of Mars from InSight seismic data

Author

Khan, Amir, primary, Ceylan, Savas, additional, van Driel, Martin, additional, Giardini, Domenico, additional, Lognonné, Philippe, additional, Samuel, Henri, additional, Schmerr, Nicholas C., additional, Stähler, Simon C., additional, Duran, Andrea C., additional, Huang, Quancheng, additional, Kim, Doyeon, additional, Broquet, Adrien, additional, Charalambous, Constantinos, additional, Clinton, John F., additional, Davis, Paul M., additional, Drilleau, Mélanie, additional, Karakostas, Foivos, additional, Lekic, Vedran, additional, McLennan, Scott M., additional, Maguire, Ross R., additional, Michaut, Chloé, additional, Panning, Mark P., additional, Pike, William T., additional, Pinot, Baptiste, additional, Plasman, Matthieu, additional, Scholz, John-Robert, additional, Widmer-Schnidrig, Rudolf, additional, Spohn, Tilman, additional, Smrekar, Suzanne E., additional, and Banerdt, William B., additional

Published
2021
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37. Thickness and structure of the martian crust from InSight seismic data

Author

Knapmeyer-Endrun, Brigitte, primary, Panning, Mark P., additional, Bissig, Felix, additional, Joshi, Rakshit, additional, Khan, Amir, additional, Kim, Doyeon, additional, Lekić, Vedran, additional, Tauzin, Benoit, additional, Tharimena, Saikiran, additional, Plasman, Matthieu, additional, Compaire, Nicolas, additional, Garcia, Raphael F., additional, Margerin, Ludovic, additional, Schimmel, Martin, additional, Stutzmann, Éléonore, additional, Schmerr, Nicholas, additional, Bozdağ, Ebru, additional, Plesa, Ana-Catalina, additional, Wieczorek, Mark A., additional, Broquet, Adrien, additional, Antonangeli, Daniele, additional, McLennan, Scott M., additional, Samuel, Henri, additional, Michaut, Chloé, additional, Pan, Lu, additional, Smrekar, Suzanne E., additional, Johnson, Catherine L., additional, Brinkman, Nienke, additional, Mittelholz, Anna, additional, Rivoldini, Attilio, additional, Davis, Paul M., additional, Lognonné, Philippe, additional, Pinot, Baptiste, additional, Scholz, John-Robert, additional, Stähler, Simon, additional, Knapmeyer, Martin, additional, van Driel, Martin, additional, Giardini, Domenico, additional, and Banerdt, W. Bruce, additional

Published
2021
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38. Volatile and Organic Compositions of Sedimentary Rocks in Yellowknife Bay, Gale Crater, Mars

Author

Ming, D. W., Archer, P. D., Jr., Glavin, D. P., Eigenbrode, J. L., Franz, H. B., Sutter, B., Brunner, A. E., Stern, J. C., Freissinet, C., McAdam, A. C., Mahaffy, P. R., Cabane, M., Coll, P., Campbell, J. L., Atreya, S. K., Niles, P. B., Bell, J. F., III, Bish, D. L., Brinckerhoff, W. B., Buch, A., Conrad, P. G., Des Marais, D. J., Ehlmann, B. L., Fairén, A. G., Farley, K., Flesch, G. J., Francois, P., Gellert, R., Grant, J. A., Grotzinger, J. P., Gupta, S., Herkenhoff, K. E., Hurowitz, J. A., Leshin, L. A., Lewis, K. W., McLennan, S. M., Miller, K. E., Moersch, J., Morris, R. V., Navarro-González, R., Pavlov, A. A., Perrett, G. M., Pradler, I., Squyres, S. W., Summons, R. E., Steele, A., Stolper, E. M., Sumner, D. Y., Szopa, C., Teinturier, S., Trainer, M. G., Treiman, A. H., Vaniman, D. T., Vasavada, A. R., Webster, C. R., Wray, J. J., and Yingst, R. A.

Published
2014

39. ABSTRACTS: Ancient Aqueous Environments at Endeavour Crater, Mars

Author

Arvidson, R. E., Squyres, S. W., Bell, J. F., III, Catalano, J. G., Clark, B. C., Crumpler, L. S., de Souza, P. A., Jr., Fairén, A. G., Farrand, W. H., Fox, V. K., Gellert, R., Ghosh, A., Golombek, M. P., Grotzinger, J. P., Guinness, E. A., Herkenhoff, K. E., Jolliff, B. L., Knoll, A. H., Li, R., McLennan, S. M., Ming, D. W., Mittlefehldt, D. W., Moore, J. M., Morris, R. V., Murchie, S. L., Parker, T. J., Paulsen, G., Rice, J. W., Ruff, S. W., Smith, M. D., and Wolff, M. J.

Published
2014

40. In Situ Radiometric and Exposure Age Dating of the Martian Surface

Author

Farley, K. A., Malespin, C., Mahaffy, P., Grotzinger, J. P., Vasconcelos, P. M., Milliken, R. E., Malin, M., Edgett, K. S., Pavlov, A. A., Hurowitz, J. A., Grant, J. A., Miller, H. B., Arvidson, R., Beegle, L., Calef, F., Conrad, P. G., Dietrich, W. E., Eigenbrode, J., Gellert, R., Gupta, S., Hamilton, V., Hassler, D. M., Lewis, K. W., McLennan, S. M., Ming, D., Navarro-González, R., Schwenzer, S. P., Steele, A., Stolper, E. M., Sumner, D. Y., Vaniman, D., Vasavada, A., Williford, K., and Wimmer-Schweingruber, R. F.

Published
2014

41. Elemental Geochemistry of Sedimentary Rocks at Yellowknife Bay, Gale Crater, Mars

Author

McLennan, S. M., Anderson, R. B., Bell, J. F., III, Bridges, J. C., Calef, F., III, Campbell, J. L., Clark, B. C., Clegg, S., Conrad, P., Cousin, A., Des Marais, D. J., Dromart, G., Dyar, M. D., Edgar, L. A., Ehlmann, B. L., Fabre, C., Forni, O., Gasnault, O., Gellert, R., Gordon, S., Grant, J. A., Grotzinger, J. P., Gupta, S., Herkenhoff, K. E., Hurowitz, J. A., King, P. L., Le Mouélic, S., Leshin, L. A., Léveillé, R., Lewis, K. W., Mangold, N., Maurice, S., Ming, D. W., Morris, R. V., Nachon, M., Newsom, H. E., Ollila, A. M., Perrett, G. M., Rice, M. S., Schmidt, M. E., Schwenzer, S. P., Stack, K., Stolper, E. M., Sumner, D. Y., Treiman, A. H., VanBommel, S., Vaniman, D. T., Vasavada, A., Wiens, R. C., and Yingst, R. A.

Published
2014

42. Mineralogy of a Mudstone at Yellowknife Bay, Gale Crater, Mars

Author

Vaniman, D. T., Bish, D. L., Ming, D. W., Bristow, T. F., Morris, R. V., Blake, D. F., Chipera, S. J., Morrison, S. M., Treiman, A. H., Rampe, E. B., Rice, M., Achilles, C. N., Grotzinger, J. P., McLennan, S. M., Williams, J., Bell, J. F., III, Newsom, H. E., Downs, R. T., Maurice, S., Sarrazin, P., Yen, A. S., Morookian, J. M., Farmer, J. D., Stack, K., Milliken, R. E., Ehlmann, B. L., Sumner, D. Y., Berger, G., Crisp, J. A., Hurowitz, J. A., Anderson, R., Des Marais, D. J., Stolper, E. M., Edgett, K. S., Gupta, S., and Spanovich, N.

Published
2014

43. A Habitable Fluvio-Lacustrine Environment at Yellowknife Bay, Gale Crater, Mars

Author

Grotzinger, J. P, Sumner, D. Y, Kah, L. C, Stack, K, Gupta, S, Edgar, L, Rubin, D, Lewis, K, Schieber, J, Mangold, N, Milliken, R, Conrad, P. G, DesMarais, D, Farmer, J, Siebach, K, Calef, F., III, Hurowitz, J, McLennan, S. M, Ming, D, Vaniman, D, Crisp, J, Vasavada, A, Edgett, K. S, Malin, M, Blake, D, Gellert, R, Mahaffy, P, Wiens, R. C, Maurice, S, Grant, J. A, Wilson, S, Anderson, R. C, Beegle, L, Arvidson, R, Hallet, B, Bristow, T. F, Eigenbrode, J, and Meyer, M

Subjects
Lunar And Planetary Science And Exploration, Exobiology
Abstract

The Curiosity rover discovered fine-grained sedimentary rocks, which are inferred to represent an ancient lake and preserve evidence of an environment that would have been suited to support a martian biosphere founded on chemolithoautotrophy. This aqueous environment was characterized by neutral pH, low salinity, and variable redox states of both iron and sulfur species. Carbon, hydrogen, oxygen, sulfur, nitrogen, and phosphorus were measured directly as key biogenic elements; by inference, phosphorus is assumed to have been available. The environment probably had a minimum duration of hundreds to tens of thousands of years. These results highlight the biological viability of fluvial-lacustrine environments in the post-Noachian history of Mars.

Published
2013
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46. Inclusive chimpanzee conservation

Author

Kimberley J. Hockings and Matthew R. McLennan

Subjects
Gynecology, Conservation of Natural Resources, medicine.medical_specialty, Multidisciplinary, Pan troglodytes, Behavioral diversity, Hominidae, Behavioral variation, Population isolation, medicine, Animals, Humans, Agricultural landscapes, Mathematics
Abstract

[Figure][1] The proximity of chimpanzee populations to human activity is just one factor in conservation priorities. PHOTO: © SHAH, ANUP/ANIMALS ANIMALS In their Report “Human impact erodes chimpanzee behavioral diversity” (29 March, p. [1453][2]), H. S. Kuhl et al. find that chimpanzees in modified landscapes show low behavioral diversity and propose the establishment of “chimpanzee cultural heritage sites” to safeguard behavioral variation. We are concerned that their conclusion propagates a view that some populations are not worth conserving. At sites with highest modification, such as agricultural landscapes where people and chimpanzees share spaces entirely, human activities are driving chimpanzee behavioral flexibility and diversification, including novel behaviors ([ 1 ][3], [ 2 ][4]). However, extinction risk in these areas is higher as a result of population isolation and anthropogenic-driven mortality ([ 3 ][5]). Conservationists also have incomplete data; not all chimpanzee behaviors in the wild are demonstrably socially learned and transmitted—and therefore cultural. We agree that it is important to protect the behavioral diversity of culturally rich wildlife ([ 4 ][6]), but such populations should not always be given blanket priority over those living in closer contact with humans. We must ensure that apes living across the anthropogenic continuum are given a fighting chance. 1. [↵][7]1. K. J. Hockings et al ., Trends Ecol. Evol. 30, 215 (2015). [OpenUrl][8][CrossRef][9][PubMed][10] 2. [↵][11]1. S. Krief et al ., PLOS One 9, e109925 (2014). [OpenUrl][12] 3. [↵][13]Arcus Foundation, State of the Apes: Industrial Agriculture and Ape Conservation (Cambridge University Press, 2015). 4. [↵][14]1. P. Brakes et al ., Science 363, 1032 (2019). [OpenUrl][15][Abstract/FREE Full Text][16] [1]: pending:yes [2]: http://www.sciencemag.org/content/363/6434/1453 [3]: #ref-1 [4]: #ref-2 [5]: #ref-3 [6]: #ref-4 [7]: #xref-ref-1-1 "View reference 1 in text" [8]: {openurl}?query=rft.jtitle%253DTrends%2BEcol.%2BEvol.%26rft.volume%253D30%26rft.spage%253D215%26rft_id%253Dinfo%253Adoi%252F10.1016%252Fj.tree.2015.02.002%26rft_id%253Dinfo%253Apmid%252F25766059%26rft.genre%253Darticle%26rft_val_fmt%253Dinfo%253Aofi%252Ffmt%253Akev%253Amtx%253Ajournal%26ctx_ver%253DZ39.88-2004%26url_ver%253DZ39.88-2004%26url_ctx_fmt%253Dinfo%253Aofi%252Ffmt%253Akev%253Amtx%253Actx [9]: /lookup/external-ref?access_num=10.1016/j.tree.2015.02.002&link_type=DOI [10]: /lookup/external-ref?access_num=25766059&link_type=MED&atom=%2Fsci%2F364%2F6445%2F1040.1.atom [11]: #xref-ref-2-1 "View reference 2 in text" [12]: {openurl}?query=rft.jtitle%253DPLOS%2BOne%26rft.volume%253D9%26rft.spage%253De109925%26rft.genre%253Darticle%26rft_val_fmt%253Dinfo%253Aofi%252Ffmt%253Akev%253Amtx%253Ajournal%26ctx_ver%253DZ39.88-2004%26url_ver%253DZ39.88-2004%26url_ctx_fmt%253Dinfo%253Aofi%252Ffmt%253Akev%253Amtx%253Actx [13]: #xref-ref-3-1 "View reference 3 in text" [14]: #xref-ref-4-1 "View reference 4 in text" [15]: {openurl}?query=rft.jtitle%253DScience%26rft_id%253Dinfo%253Adoi%252F10.1126%252Fscience.aaw3557%26rft_id%253Dinfo%253Apmid%252F30808816%26rft.genre%253Darticle%26rft_val_fmt%253Dinfo%253Aofi%252Ffmt%253Akev%253Amtx%253Ajournal%26ctx_ver%253DZ39.88-2004%26url_ver%253DZ39.88-2004%26url_ctx_fmt%253Dinfo%253Aofi%252Ffmt%253Akev%253Amtx%253Actx [16]: /lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiQUJTVCI7czoxMToiam91cm5hbENvZGUiO3M6Mzoic2NpIjtzOjU6InJlc2lkIjtzOjEzOiIzNjMvNjQzMS8xMDMyIjtzOjQ6ImF0b20iO3M6MjU6Ii9zY2kvMzY0LzY0NDUvMTA0MC4xLmF0b20iO31zOjg6ImZyYWdtZW50IjtzOjA6IiI7fQ==

Published
2019

47. Water Activity and the Challenge for Life on Early Mars

Author

Scott M. McLennan, Nicholas J. Tosca, and Andrew H. Knoll

Subjects
Meridiani Planum, Martian, Salinity, Multidisciplinary, Extraterrestrial Environment, Water activity, Chemistry, Analytical chemistry, Mars, Water, Mineralogy, Mars Exploration Program, Life, Martian surface, Exobiology, Seawater, Surface water
Abstract

In situ and orbital exploration of the martian surface has shown that acidic, saline liquid water was intermittently available on ancient Mars. The habitability of these waters depends critically on water activity ( \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \(a_{\mathrm{H}_{2}\mathrm{O}}\) \end{document} ), a thermodynamic measure of salinity, which, for terrestrial organisms, has sharply defined limits. Using constraints on fluid chemistry and saline mineralogy based on martian data, we calculated the maximum \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \(a_{\mathrm{H}_{2}\mathrm{O}}\) \end{document} for Meridiani Planum and other environments where salts precipitated from martian brines. Our calculations indicate that the salinity of well-documented surface waters often exceeded levels tolerated by known terrestrial organisms.

Published
2008

48. Two Years at Meridiani Planum: Results from the Opportunity Rover

Author

Wendy M. Calvin, Benton C. Clark, Scott M. McLennan, John P. Grotzinger, Timothy D. Glotch, Bradley L. Jolliff, Matthew P. Golombek, Nicholas J. Tosca, Harry Y. McSween, Steven W. Squyres, Andrew H. Knoll, William H. Farrand, Göstar Klingelhöfer, Raymond E. Arvidson, James F. Bell, Kenneth E. Herkenhoff, Jeffrey R. Johnson, and Albert S. Yen

Subjects
Meridiani Planum, Geologic Sediments, Extraterrestrial Environment, Outcrop, Geochemistry, Mars, Mineralogy, Weathering, engineering.material, Ferric Compounds, Time, Concretion, Spacecraft, Minerals, Multidisciplinary, Sulfates, Silicates, Water, Hematite, visual_art, engineering, visual_art.visual_art_medium, Halite, Sedimentary rock, Siliciclastic, Acids, Geology
Abstract

The Mars Exploration Rover Opportunity has spent more than 2 years exploring Meridiani Planum, traveling ∼8 kilometers and detecting features that reveal ancient environmental conditions. These include well-developed festoon (trough) cross-lamination formed in flowing liquid water, strata with smaller and more abundant hematite-rich concretions than those seen previously, possible relict “hopper crystals” that might reflect the formation of halite, thick weathering rinds on rock surfaces, resistant fracture fills, and networks of polygonal fractures likely caused by dehydration of sulfate salts. Chemical variations with depth show that the siliciclastic fraction of outcrop rock has undergone substantial chemical alteration from a precursor basaltic composition. Observations from microscopic to orbital scales indicate that ancient Meridiani once had abundant acidic groundwater, arid and oxidizing surface conditions, and occasional liquid flow on the surface.

Published
2006

49. The Opportunity Rover's Athena Science Investigation at Meridiani Planum, Mars

Author

Harry Y. McSween, J. Brückner, Wendy M. Calvin, William M. Folkner, Scott M. McLennan, J. W. Rice, G. Landis, Matthew P. Golombek, Philip R. Christensen, R. Li, David J. Des Marais, Jeffrey E. Moersch, Steven W. Squyres, Paul S. Smith, John A. Grant, Göstar Klingelhöfer, James F. Bell, Jeffrey R. Johnson, Thanasis E. Economou, Kenneth E. Herkenhoff, Heinrich Wänke, Michael C. Malin, Jack D. Farmer, Laurence A. Soderblom, N. A. Cabrol, Benton C. Clark, John P. Grotzinger, Morten Madsen, Ronald Greeley, Michael H. Carr, Claude d’Uston, T. J. Parker, M. Sims, S. P. Gorevan, M. J. Wolff, Thomas J. Wdowiak, Stubbe F. Hviid, M. D. Smith, Andrew H. Knoll, Albert S. Yen, Mark T. Lemmon, Rudolf Rieder, Larry S. Crumpler, William H. Farrand, Larry A. Haskin, D. W. Ming, Ryan C. Sullivan, Raymond E. Arvidson, Richard V. Morris, and Lutz Richter

Subjects
Meridiani Planum, Geologic Sediments, Minerals, Multidisciplinary, Extraterrestrial Environment, Atmosphere, Silicates, Geochemistry, Mars, Water, Mineralogy, Wind, Mars Exploration Program, engineering.material, Ferric Compounds, Diagenesis, Impact crater, Concretion, engineering, Siliciclastic, Sedimentary rock, Composition of Mars, Spacecraft, Evolution, Planetary, Geology
Abstract

The Mars Exploration Rover Opportunity has investigated the landing site in Eagle crater and the nearby plains within Meridiani Planum. The soils consist of fine-grained basaltic sand and a surface lag of hematite-rich spherules, spherule fragments, and other granules. Wind ripples are common. Underlying the thin soil layer, and exposed within small impact craters and troughs, are flat-lying sedimentary rocks. These rocks are finely laminated, are rich in sulfur, and contain abundant sulfate salts. Small-scale cross-lamination in some locations provides evidence for deposition in flowing liquid water. We interpret the rocks to be a mixture of chemical and siliciclastic sediments formed by episodic inundation by shallow surface water, followed by evaporation, exposure, and desiccation. Hematite-rich spherules are embedded in the rock and eroding from them. We interpret these spherules to be concretions formed by postdepositional diagenesis, again involving liquid water.

Published
2004

50. Basaltic Rocks Analyzed by the Spirit Rover in Gusev Crater

Author

James F. Bell, Keith A. Milam, Larry S. Crumpler, Raymond E. Arvidson, Larry A. Haskin, Jeffrey E. Moersch, Rudolf Rieder, Joy A. Crisp, Scott M. McLennan, David J. Des Marais, Philip R. Christensen, Steven W. Ruff, Jeffrey R. Johnson, John A. Grant, Albert S. Yen, N. A. Cabrol, G. Klingelhoefer, Trevor G. Graff, A. T. Knudson, Benton C. Clark, P. A. de Souza, Richard V. Morris, A. Ghosh, Jutta Zipfel, Ralf Gellert, Heinrich Wänke, S. P. Gorevan, Jack D. Farmer, K. E. Herkenhoff, Diana L. Blaney, Alian Wang, Steven W. Squyres, Bradley L. Jolliff, Harry Y. McSween, and Michael B. Wyatt

Subjects
Geologic Sediments, Extraterrestrial Environment, Magnesium Compounds, Mars, Mineralogy, Pyroxene, engineering.material, Feldspar, Spectroscopy, Mossbauer, Plagioclase, Composition of Mars, Basalt, Minerals, geography, Multidisciplinary, geography.geographical_feature_category, Olivine, Silicates, Spectrum Analysis, Water, Oxides, Volcanic rock, Igneous rock, visual_art, engineering, visual_art.visual_art_medium, Iron Compounds, Geology
Abstract

The Spirit landing site in Gusev Crater on Mars contains dark, fine-grained, vesicular rocks interpreted as lavas. Pancam and Mini–Thermal Emission Spectrometer (Mini-TES) spectra suggest that all of these rocks are similar but have variable coatings and dust mantles. Magnified images of brushed and abraded rock surfaces show alteration rinds and veins. Rock interiors contain ≤25% megacrysts. Chemical analyses of rocks by the Alpha Particle X-ray Spectrometer are consistent with picritic basalts, containing normative olivine, pyroxenes, plagioclase, and accessory FeTi oxides. Mössbauer, Pancam, and Mini-TES spectra confirm the presence of olivine, magnetite, and probably pyroxene. These basalts extend the known range of rock compositions composing the martian crust.

Published
2004

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