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A summary of Viking sample-trench analyses for angles of internal friction and cohesionsAnalyses of sample trenches excavated on Mars, using a theory for plowing by narrow blades, provide estimates of the angles of internal friction and the cohesions of the Martian surface materials. Angles of internal friction appear to be the same as those of many terrestrial soils because they are generally between 27 degrees and 39 degrees. Drift material, at the Lander 1 site, has a low angle of internal friction (near 18 degrees). All the materials excavated have low cohesions, generally between 0.2 and 10 kPa. The occurrence of cross bedding, layers of crusts, and blocky slabs shows that these materials are heterogeneous and that they contain planes of weakness. The results reported here have significant implications for future landed missions, Martian eolian processes, and interpretation of infrared temperatures.
Document ID
19830034356
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Moore, H. J.
(Geological Survey Menlo Park, CA, United States)
Clow, G. D.
(U.S. Geological Survey Menlo Park, CA, United States)
Hutton, R. E.
(Geological Survey Menlo Park, CA, United States)
Date Acquired
August 11, 2013
Publication Date
November 30, 1982
Subject Category
Lunar And Planetary Exploration
Accession Number
83A15574
Funding Number(s)
CONTRACT_GRANT: NASA ORDER W-14575
Distribution Limits
Public
Copyright
Other

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