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4 results on '"Hurowitz, Joel A"'

1. Physical Sedimentology and Stratigraphy of the lower Western Fan (Shenandoah formation) Jezero Crater, Mars:: Results from the Mars 2020 'Delta Front' Campaign

Author

Ives, Libby, Stack‐Morgan, Katie, Gupta, Sanjeev, Caravaca, Gwénaël, Russell, Patrick, Shuster, David L., Williams, Amy, Holm-Alwmark, Sanna, Barnes, Robert, Bell, Jim F., Beyssac, Olivier, Brown, Adrian, Flannery, David, Frydenvang, Jens, Grotzinger, John, Lamb, Michael P., Horgan, Briony, Hurowitz, Joel A., Kalucha, Hemani, Kanine, Oak, Núñez, Jorge, Randazzo, Nicolas, Seeger, Christina, Simon, Justin I., Tice, Michael M., Tebolt, Michelle, Kah, Linda C., Williams, Rebecca M.E., Amundsen, Hans, Annex, Andrew M., Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Department of Earth Science and Engineering [Imperial College London], Imperial College London, Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Department of Earth, Planetary and Space Sciences [Los Angeles] (EPSS), University of California [Los Angeles] (UCLA), University of California (UC)-University of California (UC), Berkeley Geochronology Center (BGC), Department of Geological Sciences [Gainesville] (UF|Geological), University of Florida [Gainesville] (UF), University of Copenhagen = Københavns Universitet (UCPH), Arizona State University [Tempe] (ASU), 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), NASA Headquarters, Queensland University of Technology [Brisbane] (QUT), Division of Geological and Planetary Sciences [Pasadena], California Institute of Technology (CALTECH), Purdue University [West Lafayette], Department of Geosciences [Stony Brook], Stony Brook University [SUNY] (SBU), State University of New York (SUNY)-State University of New York (SUNY), Johns Hopkins University Applied Physics Laboratory [Laurel, MD] (APL), University of Alberta, NASA Johnson Space Center (JSC), NASA, Texas A&M University [College Station], University of Texas at Austin [Austin], Department of Earth and Planetary Sciences [Knoxville], The University of Tennessee [Knoxville], Planetary Science Institute [Tucson] (PSI), and Vestfonna Geophysical

Subjects
jezero crater, delta, [SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology, Shenandoah formatin, [SDU]Sciences of the Universe [physics], [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy, Mars 2020, perseverance, Mars, sedimentology, stratigraphy, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences
Abstract

International audience; The Perseverance rover is exploring a sedimentary deposit within the Late Noachian-aged (4.0-4.8 Ga) Jezero Crater interpreted to be the remnants of a delta. From April 2022 through February 2023, Perseverance investigated the basal 25 m of sediments exposed in the fan’s eastern scarp. Rover instruments collected a suite of imaging, geochemical, mineralogical, and ground-penetrating radar data.Perseverance made detailed observations through two sections of the lower fan ~600 m apart. Similar facies and stratigraphic trends are present in both sections. Each section contains two coarsening-up successions. While some finer-grained units are laterally continuous between the two sections, the coarser-grained bodies that cap each section are laterally discontinuous and do not extend between sections.Both sequences are 10 - 15 m thick. Their lower strata are dominated by sulfate-cemented, planar laminated, very fine- to medium-grained sandstone and siltstone with rare low-angle truncations. Soft-sediment deformation occurs in the form of decimeter-scale lateral folds. Laminae are normally graded. These sequences are capped by meter-scale thick sheets of coarse-grained sandstone, pebbly sandstones, and conglomerates that are variably low-angle cross-bedded, trough cross-bedded, and planar-stratified. Plane beds are massive or normally graded.Two hypotheses for the depositional environment have emerged for this succession: a sub-aerial setting with extensive “overbank” facies and shallow braided channels and a proximal pro-deltaic setting with deposition driven by hyperpycnal flows. These hypotheses will be tested against observations made by Perseverance as it traverses the “Fan Top” and by more comprehensive studies of the “Delta Front” data.

Published
2023

2. SEDIMENTOLOGY AND STRATIGRAPHY OF THE LOWER DELTA SEQUENCE, JEZERO CRATER,MARS

Author

Stack‐Morgan, Katie, Gupta, Sanjeev, Tebolt, Michelle, Caravaca, Gwénaël, Ives, Libby, Russell, Patrick, Shuster, David L., Williams, Amy, Holm-Alwmark, Sanna, Barnes, Robert, Bell, Jim F., Beyssac, Olivier, Brown, Adrian, Flannery, David, Grotzinger, John, Horgan, Briony, Hurowitz, Joel, Kalucha, Hemani, Kanine, Oak, Núñez, Jorge, Randazzo, Nicolas, Seeger, Christina, Simon, Justin I., Tice, Michael M., Williams, Rebecca M.E., Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Department of Earth Science and Engineering [Imperial College London], Imperial College London, University of Texas at Austin [Austin], Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Department of Earth, Planetary and Space Sciences [Los Angeles] (EPSS), University of California [Los Angeles] (UCLA), University of California (UC)-University of California (UC), Berkeley Geochronology Center (BGC), Department of Geological Sciences [Gainesville] (UF|Geological), University of Florida [Gainesville] (UF), University of Copenhagen = Københavns Universitet (UCPH), Arizona State University [Tempe] (ASU), 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), NASA Headquarters, Plancius Research LLC, Queensland University of Technology [Brisbane] (QUT), Division of Geological and Planetary Sciences [Pasadena], California Institute of Technology (CALTECH), Purdue University [West Lafayette], Department of Geosciences [Stony Brook], Stony Brook University [SUNY] (SBU), State University of New York (SUNY)-State University of New York (SUNY), Johns Hopkins University Applied Physics Laboratory [Laurel, MD] (APL), University of Alberta, NASA Johnson Space Center (JSC), NASA, Texas A&M University [College Station], Planetary Science Institute [Tucson] (PSI), and Lunar and Planetary Institute

Subjects
Jezero crater, delta, [SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology, [SDU]Sciences of the Universe [physics], shenandoah formation, [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy, Mars 2020, Mars, stratigraphy, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, Sedimentology
Abstract

International audience; In April 2022, the Mars 2020 Perseverance rover arrived at the base of the ancient delta in Jezero crater after completing the first year of its mission exploring and sampling aqueously altered igneous rocks of the present-day crater floor [1]. Perseverance then spent ~200 sols exploring the lower ~25 m of rock exposed within the eastern scarp of the Jezero delta [2], a sedimentary sequence informally named the ‘Shenandoah’ formation. This studydescribes the sedimentology and stratigraphy of the Shenandoah formation explored by Perseverance at two sections—'Cape Nukshak’ and ‘Hawksbill Gap’— including a description, interpretation, and depositional framework for the facies that comprise it.

Published
2023

3. Evidence for plunging river plume deposits in the Pahrump Hills member of the Murray formation, Gale crater, Mars.

Author

Stack, Kathryn M., Grotzinger, John P., Lamb, Michael P., Gupta, Sanjeev, Rubin, David M., Kah, Linda C., Edgar, Lauren A., Fey, Deirdra M., Hurowitz, Joel A., McBride, Marie, Rivera‐Hernández, Frances, Sumner, Dawn Y., Van Beek, Jason K., Williams, Rebecca M. E., Aileen Yingst, Robin, and Tosca, Nicholas

Subjects
GALE Crater (Mars), REGIONS of freshwater influence, SEDIMENTARY structures, CRATER lakes, MARS (Planet), IMPACT craters, LUNAR craters
Abstract

Recent robotic missions to Mars have offered new insights into the extent, diversity and habitability of the Martian sedimentary rock record. Since the Curiosity rover landed in Gale crater in August 2012, the Mars Science Laboratory Science Team has explored the origins and habitability of ancient fluvial, deltaic, lacustrine and aeolian deposits preserved within the crater. This study describes the sedimentology of a ca 13 m thick succession named the Pahrump Hills member of the Murray formation, the first thick fine‐grained deposit discovered in situ on Mars. This work evaluates the depositional processes responsible for its formation and reconstructs its palaeoenvironmental setting. The Pahrump Hills succession can be sub‐divided into four distinct sedimentary facies: (i) thinly laminated mudstone; (ii) low‐angle cross‐stratified mudstone; (iii) cross‐stratified sandstone; and (iv) thickly laminated mudstone–sandstone. The very fine grain size of the mudstone facies and abundant millimetre‐scale and sub‐millimetre‐scale laminations exhibiting quasi‐uniform thickness throughout the Pahrump Hills succession are most consistent with lacustrine deposition. Low‐angle geometric discordances in the mudstone facies are interpreted as 'scour and drape' structures and suggest the action of currents, such as those associated with hyperpycnal river‐generated plumes plunging into a lake. Observation of an overall upward coarsening in grain size and thickening of laminae throughout the Pahrump Hills succession is consistent with deposition from basinward progradation of a fluvial‐deltaic system derived from the northern crater rim into the Gale crater lake. Palaeohydraulic modelling constrains the salinity of the ancient lake in Gale crater: assuming river sediment concentrations typical of floods on Earth, plunging river plumes and sedimentary structures like those observed at Pahrump Hills would have required lake densities near freshwater to form. The depositional model for the Pahrump Hills member presented here implies the presence of an ancient sustained, habitable freshwater lake in Gale crater for at least ca 103 to 107 Earth years. [ABSTRACT FROM AUTHOR]

Published
2019
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4. The Sedimentary Cycle on Early Mars.

Author

McLennan, Scott M., Grotzinger, John P., Hurowitz, Joel A., and Tosca, Nicholas J.

Subjects
MARS (Planet), PLATE tectonics, SEDIMENTARY rocks, PROVENANCE (Geology), DIAGENESIS
Abstract

Two decades of intensive research have demonstrated that early Mars (2 Gyr) had an active sedimentary cycle, including well-preserved stratigraphic records, understandable within a source-to-sink framework with remarkable fidelity. This early cycle exhibits first-order similarities to (e.g., facies relationships, groundwater diagenesis, recycling) and first-order differences from (e.g., greater aeolian versus subaqueous processes, basaltic versus granitic provenance, absence of plate tectonics) Earth's record. Mars' sedimentary record preserves evidence for progressive desiccation and oxidation of the surface over time, but simple models for the nature and evolution of paleoenvironments (e.g., acid Mars, early warm and wet versus late cold and dry) have given way to the view that, similar to Earth, different climate regimes on Mars coexisted on regional scales and evolved on variable timescales, and redox chemistry played a pivotal role. A major accomplishment of Mars exploration has been to demonstrate that surface and subsurface sedimentary environments were both habitable and capable of preserving any biological record. ▪ Mars has an ancient sedimentary rock record with many similarities to but also many differences from Earth's sedimentary rock record. ▪ Mars' ancient sedimentary cycle shows a general evolution toward more desiccated and oxidized surficial conditions. ▪ Climatic regimes of early Mars were relatively clement but with regional variations leading to different sedimentary mineral assemblages. ▪ Surface and subsurface sedimentary environments on early Mars were habitable and capable of preserving any biological record that may have existed. [ABSTRACT FROM AUTHOR]

Published
2019
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