H.G. Greene
S.R. Hartwell
M.W. Manson
S.Y. Johnson
B.E. Dieter
E.L. Phillips
J.T. Watt
2014
Geology and geomorphology--Offshore of Pacifica map area, California
vector digital data
Data Series
DS 781
Reston, VA
U.S. Geological Survey
https://pubs.usgs.gov/ds/781/OffshorePacifica/data_catalog_OffshorePacifica.html
https://doi.org/10.3133/ds781
Nadine E. Golden
2013
California State Waters Map Series Data Catalog
database
Data Series
DS 781
Reston, VA
U.S. Geological Survey
https://doi.org/10.3133/ds781
This part of DS 781 presents data for the geologic and geomorphic map of the Offshore of Pacifica map area, California. The vector data file is included in "Geology_OffshorePacifica.zip," which is accessible from https://pubs.usgs.gov/ds/781/OffshorePacifica/data_catalog_OffshorePacifica.html. These data accompany the pamphlet and map sheets of Edwards, B.D., Phillips, E.L., Dartnell, P., Greene, H.G., Bretz, C.K., Kvitek, R.G., Hartwell, S.R., Johnson, S.Y., Cochrane, G.R., Dieter, B.E., Sliter, R.W., Ross, S.L., Golden, N.E., Watt, J.T., Chin, J.L., Erdey, M.D., Krigsman, L.M., Manson, M.W., and Endris, C.A. (S.A. Cochran and B.D. Edwards, eds.), 2014, California State Waters Map Series—Offshore of Pacifica, California: U.S. Geological Survey Open-File Report 2014–1260, pamphlet 38 p., 10 sheets, scale 1:24,000, https://doi.org/10.3133/ofr20141260.
Marine geology and geomorphology was mapped in the Offshore of Pacifica 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.
To expand geologic mapping to the seafloor within the California's State Waters, to update coastal geologic mapping, and to contribute to a uniform regional geologic database, which can be used geographic information systems. Additionally, to provide a geologic map for the public and geoscience community to aid in assessments and mitigation of geologic hazards in the San Francisco coastal region and to provide sufficient geologic information for land-use and land-management decisions both onshore and offshore. This information is not intended for navigational purposes.
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in Esri format, this metadata file may include some Esri-specific terminology.
2006
2010
ground condition
none planned
-122.588071
-122.493750
37.702237
37.540691
USGS Metadata Identifier
USGS:92671d97-846f-4976-bf55-988824fa6ac6
Global Change Master Directory (GCMD)
Bathymetry
Seafloor Topography
ISO 19115 Topic Category
geoscientificInformation
environment
oceans
imageryBaseMapsEarthCover
Marine Realms Information Bank (MRIB) keywords
seabed
marine geology
geologic mapping
USGS Thesaurus
geologic maps
marine geology
sea-floor characteristics
maps and atlases
geospatial datasets
None
U.S. Geological Survey
USGS
Coastal and Marine Hazards and Resources Program
CMHRP
Pacific Coastal and Marine Science Center
PCMSC
Coastal and Marine Ecological Classification Standard (CMECS)
Marine Nearshore Subtidal
Marine Offshore Subtidal
Transform Continental Margin
Continental/Island Shelf
Rock Substrate
Unconsolidated Mineral Substrate
Geographic Names Information System (GNIS)
Pacific Ocean
State of California
Pacifica
San Mateo County
Rockaway Beach
Coastal and Marine Ecological Classification Standard (CMECS)
Northern California Ecoregion
Coastal and Marine Ecological Classification Standard (CMECS)
Substrate
none
USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator(s) of the dataset and in products derived from these data. This information is not intended for navigation purposes.
U.S. Geological Survey, Pacific Coastal and Marine Science Center
PCMSC Science Data Coordinator
mailing and physical
2885 Mission Street
Santa Cruz
CA
95060-5792
US
831-427-4747
pcmsc_data@usgs.gov
https://pubs.usgs.gov/ds/781/OffshorePacifica/images/Geology_OffshorePacifica.jpg
Geology in the Offshore Pacifica map area.
JPEG
Microsoft Windows Server 2008 R2 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcGIS 10.0.0.2414
Brian D. Edwards
Eleyne L. Phillips
Peter Dartnell
H. Gary Greene
Carrie K. Bretz
Rikk G. Kvitek
Stephen R. Hartwell
Samuel Y. Johnson
Guy R. Cochrane
Bryan E. Dieter
Ray W. Sliter
Stephanie L. Ross
Nadine E. Golden
Janet T. Watt
John L. Chin
Mercedes D. Erdey
Lisa M. Krigsman
Michael W. Manson
Charles A. Endris
2018
California State Waters Map Series--Offshore of Pacifica, California
pamphlet and map sheets
Open-File Report
2014-1260
Reston, VA
U.S. Geological Survey
https://doi.org/10.3133/ofr20141260
Map elements were visually checked for overshoots, undershoots, duplicate features, polygon closure, and other errors by the lead authors and by the GIS technician(s) who created the digital database. Review drafts of the map were reviewed internally by at least two other geologists for consistency
with basic geologic principles and general conformity to USGS mapping standards.
Data are complete: no offshore features that could be accurately identified and represented at the compilation scale of 1:24,000 were eliminated or generalized. The smallest area represented is approximately 100 square meters. All geospatial database elements are attributed.
Polygons were primarily mapped by one of the following methods: (1) interpretation of 2-meter-resolution hillshaded bathymetry data from bathymetric lidar and sonar surveys (see Bathymetry Hillshade--Offshore San Francisco, California, DS 781, for more information); (2) interpretation of 2-meter-resolution amplitude (backscatter) data from bathymetric sonar surveys (see BackscatterA_8101_2004; BackscatterB_8101_2007; BackscatterC_8101_2008; and BackscatterD_7125_2006--Offshore San Francisco, California, DS 781, for more information); (3) interpretation of 2-meter interpretation of seismic-reflection-profile data (see field activity S-15-10-NC).
Map Unit contact locations were interpreted typically at a scale of between 1:1,000 and 1:2,000 using the above base data. Bathymetric sonar and LiDAR data have a horizontal accuracy greater than the resolution of the base data.
Map unit contacts were digitized by heads-up screen digitization of line data on 2-meter-resolution DEMs described above. Horizontal accuracy is
estimated to be between 2 and 5 meters depending on how clearly contacts can be resolved.
Most digitized positions on the map are estimated to have better than 5 m horizontal accuracy. There is no elevation data in the database.
Carrie K. Bretz
Rikk G. Kvitek
Peter Dartnell
Eleyne L. Phillips
2014
Bathymetry--Offshore of Pacifica map area, California
raster digital data
Data Series
DS 781
Reston, VA
U.S. Geological Survey
See metadata for bathymetry ("Bathymetry_OffshorePacifica_metadata.txt") in DS 781 for source data and postprocessing/reprocessing information.
https://pubs.usgs.gov/ds/781/OffshorePacifica/data_catalog_OffshorePacifica.html
digital file of gridded bathymetry data (ArcInfo GRID)
2006
2009
ground condition
bathymetry
Gridded bathymetry data (2-meter resolution).
Carrie K. Bretz
Rikk G. Kvitek
Peter Dartnell
Eleyne L. Phillips
2013
Backscatter--Offshore of Pacifica map area, California
raster digital data
Data Series
DS 781
Reston, VA
U.S. Geological Survey
See metadata for backscatter ("BackscatterA_8101_OffshorePacifica_metadata.txt" and "BackscatterB_7125_OffshorePacifica_metadata.txt") in DS 781 for amplitude source data and postprocessing/reprocessing information.
https://pubs.usgs.gov/ds/781/OffshorePacifica/data_catalog_OffshorePacifica.html
digital file of gridded amplitude data (ArcInfo GRID)
2006
2007
ground condition
backscatter
Gridded amplitude data (2-meter resolution).
U.S. Geological Survey (USGS), Coastal and Marine Geology Program (CMGP)
2013
Seismic-reflection data acquisition data of field activity S-15-10-NC in offshore Pescadero from 08/02/2010 to 08/04/2010
Menlo Park, CA
U.S. Geological Survey (USGS), Coastal and Marine Geology (CMG)
https://cmgds.marine.usgs.gov/fan_info.php?fan=S1510NC
ASCII lat/long shot point files
20100802
20100804
ground condition
S-15-10-NC
Digital seismic data used to interpret subsurface geologic structure
U.S. Geological Survey (USGS), Coastal and Marine Geology Program (CMGP)
2013
Geophysical data of field activity F-2-07-NC in Ano Nuevo to San Francisco from 03/22/2007 to 04/06/2007
Menlo Park, CA
U.S. Geological Survey (USGS), Coastal and Marine Geology (CMG)
https://cmgds.marine.usgs.gov/fan_info.php?fan=F207NC
ASCII lat/long shot point files
20070322
20070406
ground condition
F-2-07-NC
Digital seismic data used to interpret subsurface geologic structure
Jane A. Reid
Jamey M. Reid
Chris J. Jenkins
Mark Zimmerman
S. Jeffress Williams
Michael E. Field
2006
usSEABED—Pacific Coast (California, Oregon, Washington) offshore surficial-sediment data release
Data Series
DS 182
Menlo Park, CA
U.S. Geological Survey
https://pubs.usgs.gov/ds/2006/182/
Esri project files, csv files
2006
publication date
sediment
seafloor sediment and rock samples used to interpret seafloor geology
Nadine E. Golden
Guy R. Cochran
2013
California Seafloor Mapping Program video and photograph portal
data release
DOI:10.5066/F7J1015K
Pacific Coastal and Marine Science Center, Santa Cruz, CA
U.S. Geological Survey
https://doi.org/10.5066/F7J1015K
seafloor video and photographs
2013
publication date
imagery
seafloor video and photographs used to interpret seafloor geology
Map unit polygons were digitized over underlying 2-meter base layers developed from multibeam bathymetry and backscatter data. Derivatives such as slope and curvature were generated from source rasters. Interpreted rasters include amplitude, hillshaded bathymetry (using various illumination angles and vertical exaggeration), slope, and curvature. Curvature was decomposed into profile and plan curvature for analysis purposes.
bathymetry
backscatter
S-15-10-NC
F-2-07-NC
sediment
imagery
2012
The mapped area was extended to the shoreline by using digital orthophotos to interpret the region between the inner edge of the multibeam bathymetry and the approximate shoreline. The approximate shoreline was generated at the NAVD88 +1.46 m contour, defined as the operational MHW shoreline by Weber and others (2005). The resulting boundary was transformed to WGS 84 UTM Zone 10 North in ArcGIS 10 using the NAD83 to WGS84 (ITRF00) transformation algorithm. This boundary was then used to extend and trim both onshore and offshore geology in the print and PDF product. The transformed boundary is contained within the WGS84 "contours" feature class and identified as a water boundary in the associated representation rules.
Only data for offshore map units are released digitally in this publication. For onshore geology, see Brabb and others (1998) and Witter and others (2006).
References Cited:
Brabb, E.E., Graymer, R.W., and Jones, D.L., 1998, Geology of the Onshore Part of San Mateo County, California: A Digital Database: U.S. Geological Survey Open-File Report 98-137, scale 1:62,500.
Weber, K.M., List, J.H., and Morgan, K.L., 2005, An operational Mean High Water datum for determination of shoreline position from topographic lidar data: U.S. Geological Survey Open-File Report 2005-1027, available at http://pubs.usgs.gov/of/2005/1027/.
Witter, R.C., Knudsen, K.L., Sowers, J.M., Wentworth, C.M., Koehler, R.D., Randolph, C.E., Brooks, S.K., and Gans, K.D., 2006, Maps of Quaternary Deposits and Liquefaction Susceptibility in the Central San Francisco Bay Region, California, U.S. Geological Survey Open-File Report 06-1037, scale 1:24,000.
2011
Added Distribution_Information section to metadata to facilitate data download.
20171005
U.S. Geological Survey
Alan O. Allwardt
Contractor -- Information Specialist
mailing and physical address
2885 Mission Street
Santa Cruz
CA
95060
831-460-7551
831-427-4748
aallwardt@usgs.gov
Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog.
20171005
U.S. Geological Survey
Alan O. Allwardt
Contractor -- Information Specialist
mailing and physical address
2885 Mission Street
Santa Cruz
CA
95060
831-460-7551
831-427-4748
aallwardt@usgs.gov
Added keywords from Coastal and Marine Ecological Classification Standard (CMECS) to metadata.
20180426
U.S. Geological Survey
Alan O. Allwardt
Contractor -- Information Specialist
mailing and physical address
2885 Mission Street
Santa Cruz
CA
95060
831-460-7551
831-427-4748
aallwardt@usgs.gov
Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed.
20201019
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Metadata was modified to bring up to current USGS PCMSC standards. USGS Thesaurus and keywords were added, information for accompanying Open-File Report added to Abstract and Cross Reference sections, Point of Contact and Metadata Contact information was updated, and Process Steps were refined. URL links for Source data were corrected. Information about the data available for download and different Network Resource Name links and details were given in the Standard Order Process section. Minor typos were corrected. No data information was changed. The metadata available from a harvester may supersede metadata bundled within a download file. Users are advised to compare the metadata dates to determine which metadata file is most recent.
20230317
Susan A Cochran
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Geologist
mailing and physical address
2885 Mission Street
Santa Cruz
CA
95060-5792
USA
(831) 460-7545
scochran@usgs.gov
Vector
GT-polygon composed of chains
188
WGS 1984 UTM Zone 10N
0.9996
-123.0
0.0
500000.0
0.0
coordinate pair
0.0001
0.0001
Meter
D WGS 1984
WGS 1984
6378137.0
298.257223563
MapUnitPolys
Polygons representing geologic / geomorphic map units
This report
OBJECTID
Internal feature number.
ESRI
Sequential unique whole numbers that are automatically generated.
Shape
Feature geometry.
ESRI
Coordinates defining the features.
MapUnitAbbrev
Map Unit abbreviation
This report
af
Artificial fill and anthropogenic material
This report
Qms
Marine nearshore and shelf deposits
This report
Qmss
Marine shelf scour depressions
This report
Qmsc
Coarse-grained marine nearshore and shelf deposits
This report
Qms/KJf
Sediment-covered Franciscan complex
This report
Tp
Purisima Formation
This report
Tss
Unnamed sandstone, shale, and congomerate
This report
TKu
Undifferentiated sedimentary deposits
This report
Kgr
Granite
This report
Kgr?
Granite (questionable)
This report
KJf
Franciscan complex
This report
Shape_Area
Area of feature in internal units squared.
ESRI
Positive real numbers that are automatically generated.
U.S. Geological Survey
mailing and physical address
345 Middlefield Rd
Menlo Park
CA
94025-3561
USA
(650) 329-4309
The .zip file (Geology_OffshorePacifica.zip) includes the .aux, .dbf, .shp, .shx, .sbx, and .sbn files, as well as FGDC-compliant metadata for the geology data layer of the Offshore of Pacifica, California, map area.
Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.
shapefile
ArcMap (version 10.0, ESRI, 2011)
Point, line, and polygon features are in shapefile format and are projected in UTM Zone 10 coordinates.
The .zip file includes the .aux, .dbf, .shp, .shx, .sbx, and .sbn files, as well as FGDC-compliant metadata for the geology data layer of the Offshore of Pacifica, California, map area.
WinZip
0.4
https://pubs.usgs.gov/ds/781/OffshorePacifica/data/Geology_OffshorePacifica.zip
https://pubs.usgs.gov/ds/781/OffshorePacifica/data_catalog_OffshorePacifica.html
https://doi.org/10.3133/ds781
The first link will begin a direct download of the data. The second link is a landing page on which all of the downloadable data for a particular region are listed. The third link is a landing page for the entire data catalog.
none
20230317
U.S. Geological Survey, Pacific Coastal and Marine Science Center
PCMSC Science Data Coordinator
mailing and physical
2885 Mission Street
Santa Cruz
CA
95060-5792
US
831-427-4747
pcmsc_data@usgs.gov
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998
local time