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Martian Fluvial Conglomerates at Gale Crater

Williams, R. M. E.; Grotzinger, J. P.; Dietrich, W. E.; Gupta, S.; Sumner, D. Y; Wiens, R. C.; Mangold, N.; Malin, M. C.; Edgett, K. S.; Maurice, S.; Forni, O.; Gasnault, O.; Ollila, A.; Newsom, H. E.; Dromart, G.; Palucis, M. C.; Yingst, R. A.; Anderson, R. B.; Herkenhoff, K. E.; Le Mouelic, S.; Goetz, W.; Madsen, M. B.; Koefoed, A.; Jensen, J. K.; Bridges, J. C.; Schwenzer, S. P.; Lewis, K. W.; Stack, K. M.; Rubin, D.; Kah, L. C.; Bell III, J. F.; Farmer, J. D.; Sullivan, R.; Van Beek, T.; Blaney, D. L.; Pariser, O. and Deen, R. G. (2013). Martian Fluvial Conglomerates at Gale Crater. Science, 340(6136) pp. 1068–1072.

DOI (Digital Object Identifier) Link: https://doi.org/10.1126/science.1237317
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Abstract

Observations by the Mars Science Laboratory Mast Camera (Mastcam) in Gale crater reveal isolated outcrops of cemented pebbles (2 to 40 millimeters in diameter) and sand grains with textures typical of fluvial sedimentary conglomerates. Rounded pebbles in the conglomerates indicate substantial fluvial abrasion. ChemCam emission spectra at one outcrop show a predominantly feldspathic composition, consistent with minimal aqueous alteration of sediments. Sediment was mobilized in ancient water flows that likely exceeded the threshold conditions (depth 0.03 to 0.9 meter, average velocity 0.20 to 0.75 meter per second) required to transport the pebbles. Climate conditions at the time sediment was transported must have differed substantially from the cold, hyper-arid modern environment to permit aqueous flows across several kilometers.

Item Type: Journal Item
Copyright Holders: 2013 American Association for the Advancement of Science
ISSN: 1095-9203
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetSP-11-134-SKUK Space Agency
Extra Information: Additonal author statement: "MSL Science Team"
Keywords: Mars; sediments; conglomerate; Mars Science Laboratory mission; Curiosity
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Environment, Earth and Ecosystem Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Research Group: Space
Item ID: 37725
Depositing User: Susanne Schwenzer
Date Deposited: 05 Jun 2013 08:45
Last Modified: 07 Dec 2018 10:16
URI: http://oro.open.ac.uk/id/eprint/37725
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