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The Origin of Sand Dune in Gale Crater, Mars
Friday, June 10, 2016 18:59
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All articles by Wretch Fossil are here: http://www.wretch.cc/blog/lin440315&category_id=0
High Dune and Namib Dune in Gale Crater, Mars began as shoals (notes 1, 2) at lake bottom. After the lake dried up, the shoals became sand dunes.
Note 1: “The origin of sand dunes is very complex, but there are three essential prerequisites: (1) An abundant supply of loose sand in a region generally devoid of vegetation (such as an ancient lake bed or river delta); (2) a wind energy source sufficient to move the sand grains; and (3) a topography whereby the sand particles lose their momentum and settle out.” (quoted from
http://waynesword.palomar.edu/ww0704.htm#Origin )
Note 1: “The origin of sand dunes is very complex, but there are three essential prerequisites: (1) An abundant supply of loose sand in a region generally devoid of vegetation (such as an ancient lake bed or river delta); (2) a wind energy source sufficient to move the sand grains; and (3) a topography whereby the sand particles lose their momentum and settle out.” (quoted from
http://waynesword.palomar.edu/ww0704.htm#Origin )
Note 2: see ooid formation in
http://www.ulb.ac.be/sciences/dste/sediment/pages_perso/Preat_fichiers/petro_carb5.one.slide.a.page.pdf
http://www.ulb.ac.be/sciences/dste/sediment/pages_perso/Preat_fichiers/petro_carb5.one.slide.a.page.pdf
Wretch Fossil’s website:http://wretchfossil.blogspot.com/
Source: http://wretchfossil.blogspot.com/2016/03/the-origin-of-sand-dune-in-gale-crater.html
