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C~'OLOGv - Con t' d <br />• The Quaternar~~ deposits in the 5oulde^ Area are of <br />four principal kinds; slluviu.^~, slope-stash colluvium, <br />eolian silt snd sand, and talus snd lsndslide deposi's, <br />These surfsce deposits were laid down during several <br />geomorphic c^cles that consisted of downwsrd stresm <br />cutting, deposition of alluvium, erosion snd deposi- <br />tion b~ wind, and soil development, <br />• <br /> <br />