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Potter Valley Hydroelectric Project FERC Project No. 77 Geologic units in the Project vicinity and along the Bartlett Springs fault (described below) are characterized by extensive landslides, particularly between Gravelly Valley and the Middle Fork of the Eel River (Ohlin et al 2010; PG E 2016) The Eel River below Dos Rios bisects the Coastal belt
By - USGS Publications Warehouse The Gravelly Valley locality is along a major, high-angle fault zone, the Hot Springs shear zone (Etter, 1979), which is in turn associated with active thermal springs
California Regional Geologic Maps It provides a complete, consistent view of the geology of the state, prepared at 1:250,000 scale The Geologic Atlas uses a single set of rock units defined by geologic time, rather than geologic formations defined by time and lithology
Mendocino County - Quarries and Beyond "In discussing the geology of this section of the Coast Ranges, one is confronted with the similarity of the character of the rocks of the different geological ages and the scarcity of fossils by which the different series of stratified rock may be distinguished
USGS Open-File Report 2010-1301, pamphlet The younger fluvial terraces and alluvial fan deposits (Qt, Qty, and Qfy) include deposits in a broad flat terrace that occupies much of the floor of Gravelly Valley, as well as the much smaller terrace deposits of Salmon and Smokehouse Creeks just above the valley
Gravelly Valley Groundwater Basin - Department Of Water Resources The Gravelly Valley Groundwater Basin is located approximately 22 miles northeast of Ukiah and consists of Quaternary alluvium and lake deposits The basin is bounded to the south by Lake Pillsbury and on all other sides by rocks of the Franciscan Formation (Jennings 1962)