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2003 Geologic Map
Geologic map of Cotati Quadrangle 2003 (California Geological Survey) showing Sonoma Volcanics (Tertiary mafic flow and breccias with interbedded tuff breccia; andesite and basaltic andesite). Yellow Qls areas are Holocene and Pleistocene landslides. Gm is roughly the indicated square.