20220721 14065100 1.0 TRUE Offshore Substrate This shapefile displays the distribution of substrate types from Pt. Arena to Pt. Sal in central/northern California. Originally this data consisted of seven paper maps (California Continental Margin Geologic Map Series) with a resolution of 1:250,000. These maps were used as baseline information for recent revisions and incorporation of high resolution multibeam data conducted by geologists from California State University - Monterey Bay and Moss Landing Marine Laboratory. Center for Coastal Monitoring and Assessment, California Continental Margin Geologic Map Series (Maps 4-6), California Division of Mines and Geology, USGS, California Coastal Commission