@article{2d2c1369de404aa88dd67660481bf315,
title = "Martian fluvial conglomerates at gale crater",
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.",
author = "Williams, {R. M.E.} and Grotzinger, {J. P.} and Dietrich, {W. E.} and S. Gupta and Sumner, {D. Y.} and Wiens, {R. C.} and N. Mangold and Malin, {M. C.} and Edgett, {K. S.} and S. Maurice and O. Forni and O. Gasnault and A. Ollila and Newsom, {H. E.} and G. Dromart and Palucis, {M. C.} and Yingst, {R. A.} and Anderson, {R. B.} and Herkenhoff, {K. E.} and {Le Mou{\'e}lic}, S. and W. Goetz and Madsen, {M. B.} and A. Koefoed and Jensen, {J. K.} and Bridges, {J. C.} and Schwenzer, {S. P.} and Lewis, {K. W.} and Stack, {K. M.} and D. Rubin and Kah, {L. C.} and Bell, {J. F.} and Farmer, {J. D.} and R. Sullivan and {Van Beek}, T. and Blaney, {D. L.} and O. Pariser and Deen, {R. G.} and Osku Kemppinen and Nathan Bridges and Johnson, {Jeffrey R.} and Michelle Minitti and David Cremers and Lauren Edgar and Austin Godber and Meenakshi Wadhwa and Danika Wellington and Ian McEwan and Claire Newman and Penelope King and Moores, {John E.}",
year = "2013",
month = may,
day = "31",
doi = "10.1126/science.1237317",
language = "English",
volume = "340",
pages = "1068--1072",
journal = "Science",
issn = "0036-8075",
publisher = "American Association for the Advancement of Science",
number = "6136",
}