The forces of gravity and friction are in balance at the angle of repose which is the maximum slope angle that unconsolidated materials can maintain. At angles steeper than the angle of repose friction is not sufficient to counter gravity and mass wasting occurs.
www.columbia.edu/~vjd1/mass_wasting.htm
Angle of repose - Wikipedia, the free encyclopedia
The angle of repose (sometimes incorrectly confused with the 'angle of internal friction') is an engineering property of granular materials. It is the maximum angle of a stable slope determined by f...
en.wikipedia.org/wiki/Angle_of_repose
There is disclosed a device and method for measuring the angle of repose of a granular material. The device is composed of a rectangular body having an open ended partition dividing the body into two ... 11. An apparatus for measuring the angle of repose of granular material comprising a body, said body divided into two...
www.freepatentsonline.com/3940997.html
Development of an Apparatus for Measuring Angle of Repose of Granular Materials; Ogbonnaya Chukwu and Fatai Bukola Akande*; Department of Agricultural Engineering, Federal University of Technology; Minna, Nigeria;
www.journal.au.edu/au_techno/2007/Jul07/auJournalTech_a... www.journal.au.edu/au_techno/2007/Jul07/auJournalTech_article10.pdf
Perhaps secondary factors such as these will affect differences in the angle of repose, but I do not think it can be gravity per se. Of course, there is no wet soil on Mars today. On Earth, the range of angles varies from ~30 to 39 . This is due to a number of factors (some eluded to above) which can be complicated.
quest.arc.nasa.gov/mars/ask/soil/Difference_in_angle_of... quest.arc.nasa.gov/mars/ask/soil/Difference_in_angle_of_repose_for_Earth_and_Mars_soils_.txt
International; Union of; Geological Science ... Compiled by COGEOENVIRONMENT (IUGS) Working Group on Geoindicators ... The following document is extracted from a monograph (Berger, A.R. & W.J.Iams 1996. Geoindicators: Assessing Rapid Environmental Changes in Earth Systems. Rotterdam: A.A.Balkema). The full rationale...
www.lgt.lt/geoin/topic.php?tid=checklist
Angle of Repose ; by Wallace Stegner; List Price: $13.95; Pages: 569; Format: Paperback ; ISBN: 014016930X; Publisher: Penguin USA ; ... Although the term 'angle of repose' refers to a resting point, Stegner's novel, if nothing else, helps us recognize America as a nation in constant flux, engaged in incessant...
www.readinggroupguides.com/guides_A/angle_of_repose1.as... www.readinggroupguides.com/guides_A/angle_of_repose1.asp
Angle of repose: The steepest angle at which loose material on a slope remains motionless. ... A wedge of the eastern slope of Turtle Mountain, measuring approximately 0.5 square mile (1.3 square kilometers) in area, gave way and hurtled 2,300 feet (700 meters) down the mountain.
www.scienceclarified.com/landforms/Faults-to-Mountains/... www.scienceclarified.com/landforms/Faults-to-Mountains/Landslide-and-Other-Gravity-Movements.html
What really interests me is how two such unlike particles clung together, and under what strains, rolling downhill into their future until they reached the angle of repose where I knew them. That’s where the interest is.
www.caribousmom.com/2008/04/17/angle-of-repose-book-rev... www.caribousmom.com/2008/04/17/angle-of-repose-book-review/
angle of repose: Definition and Pronunciation ... angle of refraction ... angle of roll...
www.factmonster.com/ipd/A0317636.html