Point Reyes National Seashore: Geologic resources inventory report
Port R. 2018. Point Reyes National Seashore: Geologic resources inventory report. Natural Resource Report. NPS/NRSS/GRD/NRR—2018/1784. National Park Service. Fort Collins, Colorado
This GRI report synthesizes discussions from a scoping meeting held in 2007 and a follow-up conference call in 2016 (see Appendix A). Chapters of this report discuss the geologic setting, distinctive geologic features and processes within Point Reyes National Seashore, highlight geologic issues facing resource managers, describe the geologic history leading to the present-day landscape, and provide information about the previously completed GRI geologic map data. A poster (in pocket) illustrates these data. Point Reyes National Seashore stands in stark contrast to the surrounding California mainland as a kind of “geologic island.” Arguably one of the most geologically active parks in the national park system, the entire peninsula was transported along faults to its current location and continues to move northwest to this day along the San Andreas Fault. Earthquakes are frequent and the park is the location of the maximum known movement [6 m (20 ft)] on the San Andreas Fault during the 1906 earthquake. The GRI geologic map data cover the area of the park, Golden Gate National Recreation Area, Muir Woods National Monument, Fort Point National Historic Site, and much of San Francisco. The data is available for download in a Geographic Information System (GIS) format at the GRI publications website: http://go.nps.gov/gripubs. A component dataset limited to the Marin Headlands and Point Reyes areas is also available for download at the GRI publications website. Mapping by the California Geological Survey (Wagner et al. 2006) and the United States Geological Survey (USGS) (Schlocker et al. 1958; Pampeyan 1994; Clark and Brabb 1997; Bonilla 1998; Blake et al. 2000; Brabb et al. 2000) served as the sources for the GRI GIS data. While the area covered by the GRI GIS data far exceeds the park’s boundary, this report will be limited to the geologic units and features mapped within Point Reyes National Seashore’s authorized boundary except where external units and features may affect geologic resource management. For geologic information regarding the north district of Golden Gate National Recreation Area, refer to the GRI report for Golden Gate NRA (Port 2016).
- Type
- Published Report
- Authors
- Port, Rebecca
- Date of Issue
- 2018-10
- Publisher
- National Park Service
- Units
- GRD , GRI , NRSS , PORE , PWRO , SFAN
- Keywords
- and Protection, California, Coastal and Marine Resource Management and Planning, Coastal Resources, Conventional Energy and Mineral Development and Extraction, Cretaceous Granitic Rocks, Disturbed Land Restoration, Documentation and Reclamation of Abandoned Mineral Lands, Earthquakes, Faults, Flooding, Folds, Franciscan Complex, Geologic Features, Geologic History, Geologic Processes, Geologic Resource Management, Geologic Resource Management Issues, Geologic Resources Division, Geologic Resources Inventory, Geothermal Features and Processes, GRD, GRI, Lacustrine Features, Landslide Hazards, Landslides, Map Units, Marine Resources, Monitoring, National Park Service, NPS, Paleontological Resource Inventory, Paleontological Resources, Point Reyes National Seashore, PORE, Quaternary Sediments, Renewable Energy Development, Resource Management, Sea Cave Inventory and Monitoring, Sea Caves, Tertiary Marine Rocks, Type Sections
- Subjects
- Ecological Framework: Geology and Soils | Geomorphology | Windblown Features and Processes , Ecological Framework: Geology and Soils | Geomorphology | Hillslope Features and Processes , Ecological Framework: Geology and Soils | Geomorphology | Coastal/Oceanographic Features and Processes , Ecological Framework: Geology and Soils | Geomorphology | Marine Features and Processes , Ecological Framework: Geology and Soils | Geomorphology | Stream/River Channel Characteristics , Ecological Framework: Geology and Soils | Geomorphology | Lake Features and Processes , Ecological Framework: Geology and Soils | Subsurface Geologic Processes | Geothermal Features and Processes , Ecological Framework: Geology and Soils | Subsurface Geologic Processes | Cave/Karst Features and Processes , Ecological Framework: Geology and Soils | Subsurface Geologic Processes | Seismic Activity , Ecological Framework: Geology and Soils | Paleontology | Paleontology