Jeff W. Beeson
Samuel Y. Johnson
Susan A. Cochran
2019
Isopachs--Punta Gorda to Point Arena, California
shapefile
Data Series
DS 781
Reston, VA
U.S. Geological Survey
https://doi.org/10.5066/P9PNNI9H
https://www.sciencebase.gov/catalog/item/5d128898e4b0941bde56eb62
Nadine E. Golden
2013
California State Waters Map Series Data Catalog
database
Data Series
DS 781
Reston, VA
U.S. Geological Survey
http://pubs.usgs.gov/ds/781/
https://cmgds.marine.usgs.gov/data/csmp/ PuntaGordaToPointArena/data_catalog_PuntaGordaToPointArena.html
This part of DS 781 presents data for the isopachs of the Punta Gorda to Point Arena, California, region. The vector data file is included in the "Isopachs_PuntaGordaToPointArena.zip," which is accessible from https://doi.org/10.5066/P9PNNI9H.
As part of the USGS's California State Waters Mapping Project, a 50-m grid of sediment thickness for the seafloor within the 3-nautical mile limit between Punta Gorda and Point Arena was generated from seismic-reflection data collected between 2010 and 2012, and supplemented with geologic structure (fault) information following the methodology of Wong (2012).
Reference Cited: Wong, F. L., Phillips, E.L., Johnson, S.Y., and Sliter, R.W., 2012, Modeling of depth to base of Last Glacial Maximum and seafloor sediment thickness for the California State Waters Map Series, eastern Santa Barbara Channel, California: U.S. Geological Survey Open-File Report 2012-1161, 16 p. (available at https://pubs.usgs.gov/of/2012/1161/).
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 aid in assessments and mitigation of geologic hazards in the Punta Gorda to Point Arena 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.
Additional information about the field activities from which these data were derived is available online at:
https://cmgds.marine.usgs.gov/fan_info.php?fan=C110NC
https://cmgds.marine.usgs.gov/fan_info.php?fan=B510NC
https://cmgds.marine.usgs.gov/fan_info.php?fan=B0412NC
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.
20100809
20120925
ground condition at time seismic data were collected
None planned
-124.452888
-123.702617
40.300181
39.020333
USGS Metadata Identifier
USGS:5d128898e4b0941bde56eb62
ISO 19115 Topic Category
environment
geoscientificInformation
oceans
Data Categories for Marine Planning
Physical Habitats and Geomorphology
Distributions
USGS Thesaurus
marine geology
seismic reflection methods
maps and atlases
stratigraphic thickness
geospatial datasets
Marine Realms Information Bank (MRIB) keywords
sediment deposition
seismic reflection profiling
None
U.S. Geological Survey
USGS
Coastal and Marine Hazards and Resources Program
CMHRP
Pacific Coastal and Marine Science Center
PCMSC
sediment thickness
sediment isopach
Geographic Names Information System (GNIS)
Pacific Ocean
State of California
Punta Gorda
Point Delgada
Shelter Cove
Fort Bragg
Mendocino
Point Arena
NGA GEOnet Names Server (GNS)
Spanish Canyon
Delgada Canyon
Noyo Canyon
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 of the dataset and in products derived from these data.
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://www.sciencebase.gov/catalog/file/get/5d1288d4e4b0941bde56eb6b?name=Isopachs_PuntaGordaToPointArena.jpg&allowOpen=true
Isopachs for the region between Point Sur and Point Arguello
JPEG
Microsoft Windows Server 2008 R2 Version 6.1 (Build 7601) Service Pack 1; Esri ArcCatalog 10.0
Jeff W. Beeson
Originator: Samuel Y. Johnson
2019
Offshore shallow structure and sediment distribution, Punta Gorda to Point Arena, northern California
Open-File Report
2019-1072
Reston, VA
U.S. Geological Survey
https://doi.org/10.3133/ofr20191072
The data points from seismic-reflection profiles are dense along tracklines (about 1-2 m apart) and sparse between tracklines (typically 1,000 m apart). 50-m cell size for interpolation is better supported along track than between.
No formal logical accuracy tests were conducted. All vector geometry and attributes are present.
Sediment thickness data points exported from Kingdom Suite profiling software were processed within the California 3-nmi limit.
The sparker position may vary as much as 20 m from the navigation reference on the vessel.
Estimated to be approximately 1 m, along the track lines where data is well constrained, but may be much greater in areas where interpolation occurred.
Beeson, J.W.
Johnson, S.Y.
Goldfinger, C.
Hartwell, S.R.
2016
Marine geophysical data—Point Arena to Cape Mendocino
SEG-Y
online
U.S. Geological Survey
https://doi.org/10.5066/F7GT5K8R
SEG-Y
20100809
20120925
ground condition
seismic
digital seismic data from Punta Gorda to Point Arena used to interpret subsurface geologic structure
Jeff W. Beeson
Samuel Y. Johnson
2019
Faults—Punta Gorda to Point Arena, California
shapefile
U.S. Geological Survey data release
doi: 10.5066/P9PNNI9H
online
U.S. Geological Survey
https://doi.org/10.5066/P9PNNI9H
shapefile
2019
publication date
faults
faults from Punta Gorda to Point Arena were used to interpret subsurface geologic structure
Water bottom (seabed) and depth to base of the Last Glacial Maximum (LGM) horizons were digitized from seismic-reflection data using Kingdom Suite software. The difference between the two horizons was exported from Kingdom Suite for every shot point as XY coordinates (UTM Zone 10) and two-way travel time (TWT). The thickness was determined by applying a sound velocity to the TWT of 1,500 m/sec in water and 1,600 m/sec velocity in sediment, resulting in sediment thickness values.
seismic
faults
2017
SedimentThicknessPoints
XY locations and sediment thickness values Z were imported to ArcGIS format as points and interpolated to a preliminary surface with TopoRaster from which isopachs (thickness contours) were extracted at 3.5 m intervals, with an additional contour at 0.25 m. Further refinement of this sediment thickness map and the isopach shapefile (see https://pubs.usgs.gov/ds/781/PuntaGordaToPointArena/data/Isopachs_PuntaGordaToPointArena.zip) was accomplished through several iterations of manual editing to incorporate geology and fault information following the methodology of Wong (2012; see http://pubs.usgs.gov/of/2012/1161/).
SedimentThicknessPoints
2017
Isopachs
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
vector
String
1332
Universal Transverse Mercator
10
0.9996
-123.00000
0.00000
500000.0
0.00
row and column
50.0
50.0
Meters
WGS84
WGS84
6378137.00
298.257223563
Isopachs
lines of equal thickness
standard sedimentology
FID
Internal feature number
Esri
Sequential unique whole numbers that are automatically generated.
Shape
Feature geometry.
Esri
Coordinates defining the features.
OBJECTID
sequential feature number
this study
sequential feature numbers
CONTOUR
line of equal thickness
this study
lines of equal thickness
U.S. Geological Survey - ScienceBase
mailing and physical
Denver Federal Center, Building 810, Mail Stop 302
Denver
CO
80225
1-888-275-8747
sciencebase@usgs.gov
The .zip file (Isopachs_PointSurToPointArugello.zip) includes the .cpg, .dbf, .prj, .sbn, .sbx, .shp, .shp.xml, and .shx files, as well as FGDC-compliant metadata for the Isopach data layer in the Punta Gorda to Point Arena region of California.
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)
Line features are in shapefile format and are projected in the UTM Zone 10 coordinate system
The .zip file includes the .cpg, .dbf, .prj, .sbn, .sbx, .shp, .shp.xml, and .shx files, as well as FGDC-compliant metadata for the Isopach data layer in the Punta Gorda to Point Arena region of California.
Winzip
15.9
https://www.sciencebase.gov/catalog/file/get/5d128898e4b0941bde56eb62?facet=Isopachs_PuntaGordaToPointArena.zip
https://doi.org/10.5066/P9PNNI9H
https://pubs.usgs.gov/ds/781/
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.
The downloadable data file has been compressed with the "zip" command and can be unzipped with Winzip (or other tool) on Windows systems. To utilize these data, the user must have software capable of uncompressing the WinZip file and importing and viewing an Esri ArcMap TIFF. Users should download the ArcGIS project file, PuntaGordaToPointArenaGIS.mxd.zip, a compressed (with the "zip" command) version of the ArcMap document (.mxd) that has all the data layers loaded in the table of contents for "Punta Gorda to Point Arena" map region and has all the data symbolized as on the map sheets. Download and save this ArcGIS project file, including all data layers, to the directory the user has created for this GIS.
20201019
U.S. Geological Survey, Pacific Coastal and Marine Science Center
PCMSC Science Data Coordinator
mailing and physical
2885 Mission Street
Santa Cruz
CA
95060
831-427-4747
pcmsc_data@usgs.gov
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998