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• Oregon
• Northern California
• Central Coast

• Carneros Clay - Marine Sedimentary Clay with Underlying Sandstone
• Russian River - Sandy Loam
• Napa-Coombsville – Cobbly Loam atop Volcanic Ash
• Sonoma Mountain – Ancient Marine Sediments over Franciscan Complex
• Sta Rita Hills – Clay Loam with Deposits of Chert and Monterey Shale
• Willamette Valley – Sedimentary Soils over Fractured Sandstone