A summary of Viking sample-trench analyses for angles of internal friction and cohesions

Details A summary of Viking sample-trench analyses for angles of internal friction and cohesions A summary of Viking sample-trench analyses for angles of internal friction and cohesions

Nov 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....8710043m&link_type=abstract

(International Colloquium on Mars, 3rd: Dedicated to Thomas A. Mutch /1931-1980/, Pasadena, CA, Aug. 30-Sept. 2, 1982.) Journal

Physics

16

Cohesion, Internal Friction, Mars Surface Samples, Soil Mechanics, Viking Lander Spacecraft, Excavation, Mars Atmosphere, Planetary Geology, Planetary Temperature

Scientific paper

Analyses 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.

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