EARTHSC 1105 Lecture Notes - Lecture 30: San Andreas Fault, Transverse Ranges, Subduction
28 Nov 2017
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Document Summary
7000-5000 years ago home to pinto basin people. 1500s to 1900s home to ancestors of modern native american tribes (cahuilla, 1936 proclaimed a national monument by franklin d. roosevelt. 1994- u. s. congress passed the california desert protection act and also established. In the mojave desert and the colorado desert in california. Has been the site of numerous movies and television shows. Was once an active gold mining area, has over 2000 abandoned mine sites. In rain shadow of the mountains to the west. Oldest rocks exposed in california (1. 65-1. 70 billion year old precambrian rocks). Gneisses and metasedimentary rocks that were scraped off of the mesozoic tectonic arc subduction zone and accreted onto the transverse ranges. Intrusive rocks of mesozoic age indicates the presence of a convergent margin and active subduction occurring along the western margin of north america. Joints fractures in rocks along which there has been no significant movement.
