[ { "id": "https://authors.library.caltech.edu/records/yt0s4-fk137", "eprint_id": 117826, "eprint_status": "archive", "datestamp": "2023-08-22 18:03:52", "lastmod": "2023-10-24 22:40:32", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Cardenas-Benjamin-T", "name": { "family": "Cardenas", "given": "Benjamin T." }, "orcid": "0000-0001-7246-219X" }, { "id": "Lamb-M-P", "name": { "family": "Lamb", "given": "Michael P." }, "orcid": "0000-0002-5701-0504" }, { "id": "Grotzinger-J-P", "name": { "family": "Grotzinger", "given": "John P." }, "orcid": "0000-0001-9324-1257" } ] }, "title": "Martian landscapes of fluvial ridges carved from ancient sedimentary basin fill", "ispublished": "pub", "full_text_status": "restricted", "keywords": "General Earth and Planetary Sciences", "note": "Funding for this study was provided in part by NASA grant NNX16AQ81G awarded to M.P.L. We thank the Mars Science Laboratory mission for support and J. Dickson for technical assistance in Caltech's Murray Lab for Planetary Visualization.", "abstract": "Large sedimentary basins contain archives of Earth history. It is unknown to what extent similar basins existed on Mars because there are few observations relating to the subsurface and it is difficult to identify buried deposits. Here, we used numerical simulations to show that landscapes of networks of topographic ridges that are abundant on the surface of Mars may represent erosional windows into thick, basin-filling river deposits that accumulated over long time spans. We used a numerical model to drive hillslope creep and differential erosion from the wind to simulate Mars-like exhumation processes acting on basin-filling fluvial strata, which we based on those buried in the Gulf of Mexico on Earth, as imaged using three-dimensional reflectance seismology. Simulations produced remarkably Martian landscapes in which the preferential erosion of mudstone relative to sandstone channel belts leads to the development of complex patterns of intersecting ridges. Our findings contrast to the existing view of ridged Martian landscapes as thin-skinned surface deposits preserving fluvial landscapes at a snapshot in time. Instead, the ridge cross-cutting patterns produced by the model reflect the exhumation of channel bodies at different stratigraphic levels, exposing basin strata accumulated over time scales of 500,000\u2009years. Thus, we propose that fluvial ridges on Mars may expose an archive of long-lived aqueous processes.", "date": "2022-11", "date_type": "published", "publication": "Nature Geoscience", "volume": "15", "number": "11", "publisher": "Nature Publishing Group", "pagerange": "871-877", "id_number": "CaltechAUTHORS:20221110-430693700.11", "issn": "1752-0894", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20221110-430693700.11", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "NNX16AQ81G" } ] }, "local_group": { "items": [ { "id": "Division-of-Geological-and-Planetary-Sciences" }, { "id": "Bruce-Murray-Laboratory-for-Planetary-Visualization" } ] }, "doi": "10.1038/s41561-022-01058-2", "pub_year": "2022", "author_list": "Cardenas, Benjamin T.; Lamb, Michael P.; et el." }, { "id": "https://authors.library.caltech.edu/records/vmapx-tg214", "eprint_id": 117695, "eprint_status": "archive", "datestamp": "2023-08-22 17:51:11", "lastmod": "2023-10-23 20:10:37", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Cardenas-Benjamin-T", "name": { "family": "Cardenas", "given": "Benjamin T." }, "orcid": "0000-0001-7246-219X" }, { "id": "Lamb-M-P", "name": { "family": "Lamb", "given": "Michael P." }, "orcid": "0000-0002-5701-0504" } ] }, "title": "Paleogeographic Reconstructions of an Ocean Margin on Mars Based on Deltaic Sedimentology at Aeolis Dorsa", "ispublished": "pub", "full_text_status": "public", "keywords": "Space and Planetary Science; Earth and Planetary Sciences (miscellaneous); Geochemistry and Petrology; Geophysics", "note": "The authors thank Editor Bradley Thomson and Associate Editor Joel Davis for the handling of our manuscript, and two reviewers whose comments helped improve the text. The authors also acknowledge Alistair Hayden and Jay Dickson for CTX DEM processing, and Jay Dickson for assistance in Caltech's Bruce Murray Laboratory for Planetary Visualization (http://murray-lab.caltech.edu/) where all mapping and analyses were performed. John Grotzinger, Chris Paola, Paul Myrow, and Woody Fischer are acknowledged for helpful discussions. MPL acknowledges funding from NASA grant NNX16AQ81G1960. \n\nData Availability Statement\nShapefiles and Python scripts upon which all analysis was based can be found on the CaltechDATA repository (Cardenas, 2022). CTX DEMs can be found on Zenodo (Cardenas et al., 2022), and were processed from CTX images (Malin, 2007). The CTX seamless global mosaic can be accessed through Caltech's Murray Lab for Planetary Visualization: http://murray-lab.caltech.edu/CTX/index.html. The Northern Gulf of Mexico deepwater bathymetry grid from 3D seismic produced by the US Department of the Interior's Bureau of Ocean Energy Management (Bureau of Ocean Energy Management, 2017) can be downloaded here: https://www.boem.gov/oil-gas-energy/mapping-and-data/map-gallery/northern-gom-deepwater-bathymetry-grid-3d-seismic", "abstract": "The evidence for an ancient ocean in Mars' northern hemispheric basin during the Noachian/Hesperian is contentious. Much of the work is based on the modern topography by assuming that erosion has not significantly reshaped the Martian surface over the last 3.5 billion years, despite evidence to the contrary. Here, we provide new evidence for a northern ocean or large sea based on stratigraphic analysis of sedimentary basin fill exposed at Aeolis Dorsa. We mapped over 6,500 km of fluvial ridges, grouped them into 20 systems, and present evidence that they are the eroded remnants of river deltas or submarine-channel belts, together defining the stratigraphy of an ancient ocean margin. We used Context Camera stereo-pair elevation models to measure the stratigraphic positions of each system and used branching directions to determine paleoflow directions. By grouping landforms based on stratigraphic position and paleoflow directions, we reconstructed the paleogeography at Aeolis Dorsa over 5 timesteps; all cases differ from the modern topography. We tracked the initial regression and later transgression of a shoreline during at least 900 m of sea-level rise, a scale consistent with a northern ocean on a warm and wet early Mars.", "date": "2022-10", "date_type": "published", "publication": "Journal of Geophysical Research. Planets", "volume": "127", "number": "10", "publisher": "American Geophysical Union", "pagerange": "Art. No. e2022JE007390", "id_number": "CaltechAUTHORS:20221103-651689700.9", "issn": "2169-9097", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20221103-651689700.9", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NASA", "grant_number": "NNX16AQ81G1960" } ] }, "local_group": { "items": [ { "id": "Division-of-Geological-and-Planetary-Sciences" }, { "id": "Bruce-Murray-Laboratory-for-Planetary-Visualization" } ] }, "doi": "10.1029/2022je007390", "pub_year": "2022", "author_list": "Cardenas, Benjamin T. and Lamb, Michael P." }, { "id": "https://authors.library.caltech.edu/records/na7nv-eja98", "eprint_id": 72453, "eprint_status": "archive", "datestamp": "2023-08-22 14:14:28", "lastmod": "2023-10-23 22:35:38", "type": "article", "metadata_visibility": "show", "creators": { "items": [ { "id": "Dickson-J-L", "name": { "family": "Dickson", "given": "James L." } }, { "id": "Levy-J-S", "name": { "family": "Levy", "given": "Joseph S." } }, { "id": "Head-J-W", "name": { "family": "Head", "given": "James W." }, "orcid": "0000-0003-2013-560X" } ] }, "title": "Time-Lapse Imaging in Polar Environments", "ispublished": "pub", "full_text_status": "public", "keywords": "Antarctica; Climate Change; Imaging; Polar Processes", "note": "\u00a9 2014 American Geophysical Union. \n\nVersion of record online: 18 November 2014. \n\nWe thank the dozens of colleagues who assisted with many field installations. In particular, guidance and support from Dave Marchant is greatly appreciated, as well as technical assistance from Brendan Hermalyn and Christoph Thomas. Logistical management from Raytheon Polar Services, Antarctic Support Contract, Petroleum Helicopters International, and Helicopters New Zealand greatly supported our efforts. This work was funded by the National Science Foundation Antarctic Science Division (Division of Polar Programs) through grants to J.W.H. (ANT-0739702), David R. Marchant (ANT- 1144224), and J.S.L. (PLR- 1343835 and PLR- 1343649), which are gratefully acknowledged.\n\n
Published - Dickson_et_al-2014-Eos,_Transactions_American_Geophysical_Union.pdf
Supplemental Material - eost2014EO460001-sup-0001-f01.docx
Supplemental Material - eost2014EO460001-sup-0001-f01.mov
Supplemental Material - eost2014EO460001-sup-0001-f02.mov
Supplemental Material - eost2014EO460001-sup-0001-f03.mov
", "abstract": "Although the drivers of climate change and its consequences in polar regions are becoming better understood [Holland and Bitz, 2003] and well monitored [Serreze et al., 2002; Doran et al., 2002b], measuring the responses of polar landscapes to changing climate boundary conditions is challenging: Polar landscapes typically respond slowly to warming but abruptly to melting [Gooseff et al., 2011].", "date": "2014-11-18", "date_type": "published", "publication": "Eos", "volume": "95", "number": "46", "publisher": "American Geophysical Union", "pagerange": "417-418", "id_number": "CaltechAUTHORS:20161130-134032785", "issn": "0096-3941", "official_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161130-134032785", "rights": "No commercial reproduction, distribution, display or performance rights in this work are provided.", "funders": { "items": [ { "agency": "NSF", "grant_number": "ANT-0739702" }, { "agency": "NSF", "grant_number": "ANT-1144224" }, { "agency": "NSF", "grant_number": "PLR-1343835" }, { "agency": "NSF", "grant_number": "PLR-1343649" } ] }, "local_group": { "items": [ { "id": "Bruce-Murray-Laboratory-for-Planetary-Visualization" } ] }, "doi": "10.1002/2014EO460001", "primary_object": { "basename": "eost2014EO460001-sup-0001-f03.mov", "url": "https://authors.library.caltech.edu/records/na7nv-eja98/files/eost2014EO460001-sup-0001-f03.mov" }, "related_objects": [ { "basename": "Dickson_et_al-2014-Eos,_Transactions_American_Geophysical_Union.pdf", "url": "https://authors.library.caltech.edu/records/na7nv-eja98/files/Dickson_et_al-2014-Eos,_Transactions_American_Geophysical_Union.pdf" }, { "basename": "eost2014EO460001-sup-0001-f01.docx", "url": "https://authors.library.caltech.edu/records/na7nv-eja98/files/eost2014EO460001-sup-0001-f01.docx" }, { "basename": "eost2014EO460001-sup-0001-f01.mov", "url": "https://authors.library.caltech.edu/records/na7nv-eja98/files/eost2014EO460001-sup-0001-f01.mov" }, { "basename": "eost2014EO460001-sup-0001-f02.mov", "url": "https://authors.library.caltech.edu/records/na7nv-eja98/files/eost2014EO460001-sup-0001-f02.mov" } ], "pub_year": "2014", "author_list": "Dickson, James L.; Levy, Joseph S.; et el." } ]