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Northern Sierran Foothills

Ecoregion in Sierra Nevada, CA

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The Northern Sierran Foothills consist of moderately steep to steep mountains and hills at the western foot of the northern and central Sierra Nevada. The Melones Fault Zone is in this unit. Geology is a complex mix of mafic volcanics, granodiorite, slate and graywacke, argillite and quartzite, and some ultramafic bands of peridotite and serpentinite. The soil temperature regime is thermic and soil moisture regime is xeric. Common vegetation includes needlegrass and annual grasslands, chamise, manzanita, interior live oak, ceanothus, blue oak, and foothill pine. Runoff is rapid; streams drain to the Feather, Sacramento, and San Joaquin Rivers.

— EPA

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