|Eastern Mojave Vegetation||Tehama County Route 122|
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Round Valley Serpentinite Mélange
|Tehama County Route runs westward from Paskenta, skirting around the north edge of the Thomes Creek basin to the Pacific-Sacramento divide just south of the junctions of Tehama, Trimity and Mendocino counties.|
This is the south flank of Round Mountain. The peak is 0.1 mile north.
Round Valley Serpentinite MélangeHuot and Maury (2002) studied the Round Mountain serpentinite mélange west of Paskenta. They found that the Round Mountain mélange was a middle Jurassic backarc basin that lay west of the ensimatic Smartville island arc that was later involved in the Sierra Nevada orogeny. Subsequent collapse of the backarc basin initiated Franciscan subduction. The Round Mountain serpentinite mélange was formed by underthrusting of the upper part of the backarc crust followed by its tectonic accretion to the overriding lithospheric wedge.
Junction: Forest Road 24N09, about 1 mile to Eagle Peak.
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Date and time this article was prepared: 1/19/2021 5:32:30 PM