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Location Folder Show Tree ROOT _ScienceBase Catalog __USGS California Water Science Center ___CAWSC Data Releases (Published) 1992 digital surface model and orthomosaic of Malakoff Diggins State Historic Park, California Aerial imagery and other remotely-sensed data from a UAS survey of Pepperwood Preserve, Sonoma County, CA Assessing spatial variability of nutrients, phytoplankton and related water-quality constituents in the California Sacramento-San Joaquin Delta at the landscape scale: High-resolution mapping surveys Basin Characterization Model (BCMv8) for California Coastal Basins - Monthly Historical (water years 1896-2019) and Future (water years 2006-2099) Climate and Hydrology Basin Characterization Model (BCMv8) monthly recharge and runoff for the Anza-Cahuilla Groundwater Basin, California More... Filters Date Range Past year (1) Past month (0) Past week (0) Past day (0) Custom range... To   Search Extensions Shapefile (1) Types Downloadable (1) Map Service (1) OGC WFS Layer (1) OGC WMS Layer (1) Shapefile (1) Contacts U.S. Geological Survey, SOUTHWEST REGION California Water Science Center U.S. Geological Survey U.S. Geological Survey - ScienceBase Brianne E Brussee More... Categories Data (2) Tag Types USGS Scientific Topic Keyword (2) Theme (2) Harvest Set (2) Place (2) Tag Schemes USGS Thesaurus (2) Common geographic areas (2) ISO 19115 Topic Category (1) View Results as: JSON ATOM CSV Browse Folder

Geochemical data for water, sediment, and biota in areas affected by historical mining, northwestern Sierra Nevada and Trinity Mountains, California This dataset includes data for water, sediment, and biota samples collected at 250 locations in the northwestern Sierra Nevada and the Trinity Mountains during 1999–2012. The locations were chosen to assess potential effects from historical mining, with a focus primarily on mercury contamination associated with placer gold mines in the Sierra Nevada and the Trinity Mountains, and a hard-rock mercury mine in the Trinity Mountains. Trace elements and major elements were analyzed in selected samples. All analyses of mercury, methylmercury, and (or) trace and major elements in water and sediment were performed by U.S. Geological Survey laboratories. Biota samples (invertebrates, fish, and frogs) were analyzed for mercury,... Categories: Data; Tags: Aquatic Biology, California, Environmental Health, Geochemistry, Hydrology, All tags... Mineral Resources, Sedimentology, USGS Science Data Catalog (SDC), Water Quality, biota, chemical analysis, geoscientificInformation, mercury contamination, Fewer tags Update of the Mineral Resources Data System for California including Mineral Deposit Types There are more than 42,000 entries in the USGS Mineral Resources Data System (MRDS) for the State of California. Previously, the field for deposit type was sparsely populated, which made it difficult to evaluate mine sites needing environmental remediation. This has been rectified by populating the deposit type field using 100 deposit types cited in previous USGS publications, and 137 provisional deposit types described here. Other categories listed in the deposit type field include 29 types of mineral processing facilities, 6 miscellaneous categories used previously in MRDS, and 56 unclassified categories tied to primary commodity. References are provided for each deposit type, as available, including descriptive... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: California, Mineral Resources, USGS Science Data Catalog (SDC), economic geology, geospatial datasets, All tags... mineral resources, Fewer tags