1. Coastal and Marine Hazards and Resources
  2. Geoscience Data System
  3. Dataset 41565

Dataset description: Geology and geomorphology--Offshore of Tomales Point Map Area, California

This part of DS 781 presents data for the geologic and geomorphic map of the Offshore of Tomales Point map area, California. The vector data file is included in "Geology_OffshoreTomalesPoint.zip," which is accessible from https://pubs.usgs.gov/ds/781/OffshoreTomalesPoint/data_catalog_OffshoreTomalesPoint.html. These data accompany the pamphlet and map sheets of Johnson, S.Y., Dartnell, P., Golden, N.E., Hartwell, S.R., Greene, H.G., Erdey, M.D., Cochrane, G.R., Watt, J.T., Kvitek, R.G., Manson, M.W., Endris, C.A., Dieter, B.E., Krigsman, L.M., Sliter, R.W., Lowe, E.N., and Chin, J.L. (S.Y. Johnson and S.A. Cochran, eds.), 2015, California State Waters Map Series-Offshore of Tomales Point, California: U.S. Geological Survey Open-File Report 2015-1088, pamphlet 38 p., 10 sheets, scale 1:24,000, https://doi.org/10.3133/ofr20151088. Marine geology and geomorphology was mapped in the Offshore of Tomales Point map area, California, from approximate Mean High Water (MHW) to the 3-nautical-mile limit of California's State Waters. Offshore geologic units were delineated on the basis of integrated analyses of adjacent onshore geology with multibeam bathymetry and backscatter imagery, seafloor-sediment and rock samples, digital camera and video imagery, and high-resolution seismic-reflection profiles.
Version1
Keywordssea-floor characteristics, geologic maps, geospatial datasets, maps and atlases, marine geology
Data typesGeology
Formatshapefile;
Amount0.6 MB

Contacts

Contact
Stephen Hartwell
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Location of materials and files

Public files
Metadatahttps://cmgds.marine.usgs.gov/metadata/pcmsc/SeriesReports/DS_DDS/DS_781/TomalesPoint/Geology_OffshoreTomalesPoint_metadata.xml
Outline - Questions and answers - Text - XML

Activities and equipment

ActivityEquipment
S1510NCsparker
shallow-penetrating continuous seismic profiling (3.5-khz system, 150-joule sparker)