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Unformatted text preview: 4/18/06 Tectonic California Mountains & Earthquakes Lecture 20 The Central Spine o Sierra Nevadas Goes up to 14,000 ft in the southern sierra Nevadas Then drops abruptly to below sea level Southern End Higher Exposed Granite Overlay eroded away o Northern End Lower Metamorphic Overlay Lava caps More rain comes across the north so there is more snow o Coast Ranges Northern Higher and Older Above San Francisco Eel River Central (Southern) Lower and more recent Big Sir Ranges around the Bay Berkeley Hills, Diablo Ranges, Hamilton Range, Santa Cruz Mountains, Tamalpais, Mt San Bruno Coastal Valleys, Sacramento River, Very Recent (<10K years) Valleys in Coast Ranges include Salinas Valley, Southern Santa Clara Valley, Napa Valley, Berryessa Valley o Central Valley Divided Valley Sacramento Valley o Delta San Joaquin Valley o Tulare Basin 500 miles long and 50 miles wide o Basin & range East of the Sierra Nevada & Utah & a fringe of California...
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- Spring '06