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281 results on '"Burney, David A."'

1. 17 Endogenous Lunar Volatiles

Author

McCubbin, Francis M., primary, Barnes, Jessica J., additional, Ni, Peng, additional, Hui, Hejiu, additional, Klima, Rachel L., additional, Burney, David, additional, Day, James M. D., additional, Magna, Tomáš, additional, Boyce, Jeremy W., additional, Tartèse, Romain, additional, Vander Kaaden, Kathleen E., additional, Steenstra, Edgar, additional, Elardo, Stephen M., additional, Zeigler, Ryan A., additional, Anand, Mahesh, additional, and Liu, Yang, additional

Published
2024
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3. Comparison of Nondestructive Methods for Detecting Reinforcing Bar Placement.

Author

Burney, David C., Kurtis, Kimberly E., Jacobs, Laurence J., and Sherman, Ryan J.

Abstract

Despite improvements in nondestructive testing (NDT) technologies, the quality assurance of concrete reinforcing bar placement is still primarily conducted with conventional methodologies, which can be time-consuming, ineffective, and damaging to the concrete components. This study investigated the performance of two commercially available cover meters and one groundpenetrating radar (GPR) device. A cover meter was found to have the greatest accuracy for depths smaller than 3.19 in. (81.0 mm), while the GPR performed better for greater depths. The effect of reinforcing bar depth, diameter, and type; neighboring reinforcing bars; and concrete conditioning on the performance of the devices was quantified. The use of epoxy-coated reinforcing bar, galvanized reinforcing bar, and stainless-steel reinforcing bar were found to have a negligible effect on cover meter accuracy. A model was developed to predict the precision of the GPR post-measurement analysis given a depth and concrete dielectric constant. [ABSTRACT FROM AUTHOR]

Published
2024
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5. Conservation Paleobiology: Leveraging Knowledge of the Past to Inform Conservation and Restoration

Author

Dietl, Gregory P, Kidwell, Susan M, Brenner, Mark, Burney, David A, Flessa, Karl W, Jackson, Stephen T, and Koch, Paul L

Subjects
Life on Land, biotic response, ecology, environmental stressors, evolution, geohistorical records, Physical Sciences, Earth Sciences, Geochemistry & Geophysics
Abstract

Humans now play a major role in altering Earth and its biota. Finding ways to ameliorate human impacts on biodiversity and to sustain and restore the ecosystem services on which we depend is a grand scientific and societal challenge. Conservation paleobiology is an emerging discipline that uses geohistorical data to meet these challenges by developing and testing models of how biota respond to environmental stressors. Here we (a) describe how the discipline has already provided insights about biotic responses to key environmental stressors, (b) outline research aimed at disentangling the effects of multiple stressors, (c) provide examples of deliverables for managers and policy makers, and (d) identify methodological advances in geohistorical analysis that will foster the next major breakthroughs in conservation outcomes. We highlight cases for which exclusive reliance on observations of living biota may lead researchers to erroneous conclusions about the nature and magnitude of biotic change, vulnerability, and resilience.

Published
2015

12. Biome Reconstruction from Pollen and Plant Macrofossil Data for Africa and the Arabian Peninsula at 0 and 6000 Years

Author

Jolly, Dominique, Prentice, I. Colin, Bonnefille, Raymonde, Ballouche, Aziz, Bengo, Martin, Brenac, Patrice, Buchet, Guillaume, Burney, David, Cazet, Jean-Pierre, Cheddadi, Rachid, Edorh, Therese, Elenga, Hilaire, Elmoutaki, Saida, Guiot, Joel, Laarif, Fouzia, Lamb, Henry, Lezine, Anne-Marie, Maley, Jean, Mbenza, Muaka, Peyron, Odile, Reille, Maurice, Reynaud-Farrera, Isabelle, Riollet, Guy, Ritchie, Jim C., Roche, Emile, Scott, Louis, Ssemmanda, Immaculate, Straka, Herbert, Umer, Mohammed, van Campo, Elise, Vilimumbalo, Sikiminywa, Vincens, Annie, and Waller, Martyn

Published
1998

20. Early State Formation in Central Madagascar : An Archaeological Survey of Western Avaradrano

Author

WRIGHT, HENRY T., EDITED BY, BAILIFF, IAN, BURNEY, DAVID, DEWAR, ROBERT, GABLER, SIGRID, HAAS, HERBERT, HOLL, AUGUSTIN F.C., KUS, SUSAN, RAFOLO, ANDRIANAIVOARIVONY, RAHARIJAONA, VICTOR, RAKOTOARISOA, JEAN-AIMÉ, RAKOTOVOLOLONA, SOLO HILARION, RASAMUEL, DAVID, SCHWARTZ, GEORGE, WETTERSTROM, WILMA, WRIGHT, HENRY T., WRIGHT, HENRY T., BAILIFF, IAN, BURNEY, DAVID, DEWAR, ROBERT, GABLER, SIGRID, HAAS, HERBERT, HOLL, AUGUSTIN F.C., KUS, SUSAN, RAFOLO, ANDRIANAIVOARIVONY, RAHARIJAONA, VICTOR, RAKOTOARISOA, JEAN-AIMÉ, RAKOTOVOLOLONA, SOLO HILARION, RASAMUEL, DAVID, SCHWARTZ, GEORGE, WETTERSTROM, WILMA, and WRIGHT, HENRY T.

Published
2020
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23. Endogenous Lunar Volatiles

Author

McCubbin, Francis M, Liu, Yang, Barnes, Jessica J, Anand, Mahesh, Boyce, Jeremy W, Burney, David, Day, James M. D, Elardo, Stephen M, Hui, Hejiu, Klima, Rachel L, Magna, Tomas, Ni, Peng, Steenstra, Edgar, Tartèse, Romain, and Vander Kaaden, Kathleen E

Subjects
Lunar And Planetary Science And Exploration
Abstract

Despite all of the new data generated on endogenous lunar volatiles since the publication of New Views of the Moon, many important questions remain unanswered or only partially resolved. This abstract looks to the future and discusses several of those important remaining questions on the topic of endogenous lunar volatiles.

Published
2018

33. Globally distributed iridium layer preserved within the Chicxulub impact structure

Author

Goderis, Steven, Sato, Honami, Ferriere, Ludovic, Schmitz, Birger, Burney, David, Kaskes, Pim, Vellekoop, Johan, Wittmann, Axel, Schulz, Toni, Chernonozhkin, Stepan M., Claeys, Philippe, de Graaff, Sietze J., Dehais, Thomas, de Winter, Niels J., Elfman, Mikael, Feignon, Jean-Guillaume, Ishikawa, Akira, Koeberl, Christian, Kristiansson, Per, Neal, Clive R., Owens, Jeremy D., Schmieder, Martin, Sinnesael, Matthias, Vanhaecke, Frank, Van Malderen, Stijn J. M., Bralower, Timothy J., Gulick, Sean P. S., Kring, David A., Lowery, Christopher M., Morgan, Joanna, V, Smit, Jan, Whalen, Michael T., Goderis, Steven, Sato, Honami, Ferriere, Ludovic, Schmitz, Birger, Burney, David, Kaskes, Pim, Vellekoop, Johan, Wittmann, Axel, Schulz, Toni, Chernonozhkin, Stepan M., Claeys, Philippe, de Graaff, Sietze J., Dehais, Thomas, de Winter, Niels J., Elfman, Mikael, Feignon, Jean-Guillaume, Ishikawa, Akira, Koeberl, Christian, Kristiansson, Per, Neal, Clive R., Owens, Jeremy D., Schmieder, Martin, Sinnesael, Matthias, Vanhaecke, Frank, Van Malderen, Stijn J. M., Bralower, Timothy J., Gulick, Sean P. S., Kring, David A., Lowery, Christopher M., Morgan, Joanna, V, Smit, Jan, and Whalen, Michael T.

Abstract

The Cretaceous-Paleogene (K-Pg) mass extinction is marked globally by elevated concentrations of iridium, emplaced by a hypervelocity impact event 66 million years ago. Here, we report new data from four independent laboratories that reveal a positive iridium anomaly within the peak-ring sequence of the Chicxulub impact structure, in drill core recovered by IODP-ICDP Expedition 364. The highest concentration of ultrafine meteoritic matter occurs in the post-impact sediments that cover the crater peak ring, just below the lowermost Danian pelagic limestone. Within years to decades after the impact event, this part of the Chicxulub impact basin returned to a relatively low-energy depositional environment, recording in unprecedented detail the recovery of life during the succeeding millennia. The iridium layer provides a key temporal horizon precisely linking Chicxulub to K-Pg boundary sections worldwide.

Published
2021

36. Globally distributed iridium layer preserved within the Chicxulub impact structure

Author

Goderis, Steven, Sato, Honami, Ferrière, Ludovic, Schmitz, Birger, Burney, David, Kaskes, Pim, Vellekoop, Johan, Wittmann, Axel, Schulz, Toni, Chernonozhkin, Stepan, Claeys, Philippe, de Graaff, Sietze, Déhais, Thomas, de Winter, Niels, Elfman, Mikael, Feignon, Jean-Guillaume, Ishikawa, Akira, Koeberl, Christian, Kristiansson, Per, Neal, Clive, Owens, Jeremy, Schmieder, Martin, Sinnesael, Matthias, Vanhaecke, Frank, Van Malderen, Stijn, Bralower, Timothy, Gulick, Sean, Kring, David, Lowery, Christopher, Morgan, Joanna, Smit, Jan, Whalen, Michael, Chenot, Elise, Christeson, Gail l., Cockell, Charles S., Gebhardt, Catalina, Goto, Kazuhisa, Green, Sophie L., Jones, Heather, LeBer, Erwan, Lofi, Johanna, IODP-ICDP Expedition 364 scientists,, Perez-Cruz, Ligia, Pickersgill, Annemarie E., Poelchau, Michael H., Rae, Auriol S.P., Rasmussen, Cornelia, Rebolledo-Vieyra, Mario, Riller, Ulrich, Tikoo-Schantz, Sonia M., Tomioka, Naotaka, Urrutia-Fucugauchi, Jaime, Xiao, Long, Yamaguchi, Kosei E., Stratigraphy and paleontology, Stratigraphy & paleontology, Natural Environment Research Council (NERC), Earth Sciences, Chemistry, Analytical, Environmental & Geo-Chemistry, Faculty of Sciences and Bioengineering Sciences, Institut de chimie et procédés pour l'énergie, l'environnement et la santé (ICPEES), Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Biological Psychology, Texts and Traditions, and Sociology and Social Gerontology

Subjects
010504 meteorology & atmospheric sciences, Cretaceous–Paleogene boundary, 010502 geochemistry & geophysics, 01 natural sciences, Chicxulub crater, Sedimentary depositional environment, Paleontology, Impact crater, Iridium anomaly, SDG 14 - Life Below Water, Impact structure, ComputingMilieux_MISCELLANEOUS, Research Articles, 0105 earth and related environmental sciences, Horizon (geology), Extinction event, Multidisciplinary, SciAdv r-articles, Généralités, Geology, IODP-ICDP Expedition 364 Scientists, K-Pg boundary, Chemistry, [SDU]Sciences of the Universe [physics], Hypervelocity, mass extinction, Research Article
Abstract

The Cretaceous-Paleogene (K-Pg) mass extinction is marked globally by elevated concentrations of iridium, emplaced by a hypervelocity impact event 66 million years ago. Here, we report new data from four independent laboratories that reveal a positive iridium anomaly within the peak-ring sequence of the Chicxulub impact structure, in drill core recovered by IODP-ICDP Expedition 364. The highest concentration of ultrafine meteoritic matter occurs in the post-impact sediments that cover the crater peak ring, just below the lowermost Danian pelagic limestone. Within years to decades after the impact event, this part of the Chicxulub impact basin returned to a relatively low-energy depositional environment, recording in unprecedented detail the recovery of life during the succeeding millennia. The iridium layer provides a key temporal horizon precisely linking Chicxulub to K-Pg boundary sections worldwide., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2020
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37. Subfossil lemur discoveries from the Beanka Protected Area in western Madagascar

Author

Burney, David A., Andriamialison, Haingoson, Andrianaivoarivelo, Radosoa A., Bourne, Steven, Crowley, Brooke E., Boer, Erik J. de, Godfrey, Laurie R., Goodman, Steven M., Griffiths, Christine, Griffiths, Owen, Hume, Julian P., Joyce, Walter G., Jungers, William L., Marciniak, Stephanie, Middleton, Gregory J., Muldoon, Kathleen M., Noromalala, Eliette, Pérez, Ventura R., Perry, George H., Randalana, Roger, Wright, Henry T., Burney, David A., Andriamialison, Haingoson, Andrianaivoarivelo, Radosoa A., Bourne, Steven, Crowley, Brooke E., Boer, Erik J. de, Godfrey, Laurie R., Goodman, Steven M., Griffiths, Christine, Griffiths, Owen, Hume, Julian P., Joyce, Walter G., Jungers, William L., Marciniak, Stephanie, Middleton, Gregory J., Muldoon, Kathleen M., Noromalala, Eliette, Pérez, Ventura R., Perry, George H., Randalana, Roger, and Wright, Henry T.

Abstract

A new fossil site in a previously unexplored part of western Madagascar (the Beanka Protected Area) has yielded remains of many recently extinct vertebrates, including giant lemurs (Babakotia radofilai, Palaeopropithecus kelyus, Pachylemur sp., and Archaeolemur edwardsi), carnivores (Cryptoprocta spelea), the aardvark-like Plesiorycteropus sp., and giant ground cuckoos (Coua). Many of these represent considerable range extensions. Extant species that were extirpated from the region (e.g., Prolemur simus) are also present. Calibrated radiocarbon ages for 10 bones from extinct primates span the last three millennia. The largely undisturbed taphonomy of bone deposits supports the interpretation that many specimens fell in from a rock ledge above the entrance. Some primates and other mammals may have been prey items of avian predators, but human predation is also evident. Strontium isotope ratios (87Sr/86Sr) suggest that fossils were local to the area. Pottery sherds and bones of extinct and extant vertebrates with cut and chop marks indicate human activity in previous centuries. Scarcity of charcoal and human artifacts suggests only occasional visitation to the site by humans. The fossil assemblage from this site is unusual in that, while it contains many sloth lemurs, it lacks ratites, hippopotami, and crocodiles typical of nearly all other Holocene subfossil sites on Madagascar.

Published
2020

40. Pleistocene rewilding: an optimistic agenda for twenty-first century conservation

Author

Donlan, C. Josh, Berger, Joel, Bock, Carl E., Bock, Jane H., Burney, David A., Estes, James A., Foreman, Dave, Martin, Paul S., Roemer, Gary W., Smith, Felisa A., Soule, Michael E., and Greene, Harry W.

Subjects
Glacial epoch -- Research, Conservation biology -- Research, Human ecology -- Research, Carnivora -- Environmental aspects, Carnivora -- Research, Biological sciences, Earth sciences
Published
2006

41. Life History Variation in Madagascar’s Giant Extinct Lemurs

Author

Godfrey, Laurie R., primary, Schwartz, Gary T., additional, Jungers, William L., additional, Catlett, Kierstin K., additional, Samonds, Karen E., additional, King, Stephen J., additional, Muldoon, Kathleen M., additional, Irwin, Mitchell T., additional, and Burney, David A., additional

Published
2012
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45. Rock art from Andriamamelo Cave in the Beanka Protected Area of western Madagascar.

Author

Burney, David A., Hume, Julian P., Randalana, Roger, Andrianaivoarivelo, Radosoa A., Griffiths, Owen, Middleton, Gregory J., Rasolondrainy, Tanambelo, Ramilisonina, and Radimilahy, Chantal

Subjects
*ROCK art (Archaeology), *ROCK paintings, *CAVE paintings, *MEGAFAUNA, *LEMURS, *LAZINESS
Abstract

Stylistically unique black rock drawings have been discovered in Andriamamelo Cave in western Madagascar. Several image groupings comprise naturalistic scenes with anthropomorphic, zoomorphic, and therianthropic figures. These complex images are not similar to the polychrome painted symbols previously described from the Isalo region of SW Madagascar. Eight instances were noted where images and themes suggest Ptolemaic Egyptian mythological characters and symbols, some possibly of stellar constellations. One type of M-shaped figure occurred 16 times throughout the entire design field. We have not found this figure in other rock art around the Indian Ocean, except a rare occurrence in Borneo, believed to have been created about 2000 years ago. It also matches one distinctive character found in the Amharic alphabet of Ethiopia. One set of eight curvilinears resemble Arabic characters or indigenous Sorabe. Extant animals were tentatively identified, and also three of the extinct megafauna may be pictured (elephant bird, tortoise, and sloth lemur). The latter appears in an inferred hunting scene, with a hunter pointing a weapon, the giant lemur upside down, and two dogs. Images suggest connections between traditional Malagasy symbology and the disparate worlds of the island's ancient influences, both from NE Africa and Borneo. Milligram-sized samples of the black pigment were collected from an image for AMS 14C dating, but they contained insufficient carbon in aggregate. [ABSTRACT FROM AUTHOR]

Published
2022
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