HYDRCARB is a point data file that includes sample locations and results of hydrocarbon analyses. Samples for this study were collected from the Monterey Bay area during USGS Coastal and Marine Geology (CMG) survey M195MB (<http://walrus.wr.usgs.gov/infobank>).
This is one of a collection of digital files of a geographic information system of spatially referenced data related to the USGS Coastal and Marine Geology Program "Monterey Bay National Marine Sanctuary Project" <http://walrus.wr.usgs.gov/mbms>. The data were collected and analyzed between 1994 and 2000.
Additional information about USGS field activity M195MB is available at <http://walrus.wr.usgs.gov/infobank/m/m195mb/html/m-1-95-mb.meta.html>
Kvenvolden, Keith.A., Hostettler, Francis .D. , Rosenbauer, Robert J. , Lorenson, Thomas .D. , Castle, William T. , Sugarman, Susan, and Wong, Florence L. , 2001, HYDRCARB - analyses of hydrocarbons in near-surface samples from Monterey Bay:.This is part of the following larger work.Online Links:
Wong, F.L., and Eittreim, S.E., 2001, Continental Shelf GIS for the Monterey Bay National Marine Sanctuary: U.S. Geological Survey Open-File Report 01-179, U.S. Geological Survey, Menlo Park, CA.Online Links:
This is a Point data set. It contains the following vector data types (SDTS terminology):
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 11.55854744413
Ordinates (y-coordinates) are specified to the nearest 11.55854744413
Planar coordinates are specified in Meters
The horizontal datum used is North American Datum of 1983.
The ellipsoid used is GRS1980.
The semi-major axis of the ellipsoid used is 6378137.0.
The flattening of the ellipsoid used is 1/298.257.
The point attribute table HYDRCARB.PAT contains the following attributes.
LONGITUDE83 longitude of point (decimal degrees), datum NAD83
LATITUDE83 latitude of point (decimal degrees), datum NAD83
CRUISEID cruise identifier, for example M195MB
NAVTIMEC navigation time when sample was collected in
YYYYDDDHHMMSSS format where YYYY is year,
DDD day of the year (1-366), HH hour (0-23),
MM minutes (0-59), SSS seconds (0-59) and tenths
of seconds (0-9)
DEPTH_M depth of water (meters) at sample site
SAMPLEID sample identifier
EQUIPMENT type of equipment used to collect sample
EPA_NO sample identifier based on U.S. Environmental
Protection Agency (EPA) sampling scheme
LENGTH_M length of core (meters)
DESCRIPTION sediment type: "sandy mud", "pebbles", "Clams in mud"
TOC Total organic carbon (wt%)
PR/PH Pristane/Phytane
PAH Total polycyclic aromatic hydrocarbons (ng/g) , analyses performed by California Department of Fish & Game, Petroleum Chemistry Laboratory.
TM/TS 17a-22,29,30-trisnorhopane/18a-22,29,30-trisnorneohopane.
TRIPLET [C26-tricyclic terpane (S?)+C26-tricyclic terpane(R?)]/C24-tetracyclic terpane.
C30/C29 17a,21b(H)-hopane/17a,21b(H)-30-norhopane.
C31(S/S+R) 17a,21b(H)-homohopane(22S)/17a,21b(H)-homohopane (22S)+(22R).
B/HOP 17a,18a,21b(H)-28,30-bisnorhopane/17a,21b,(H)-hopane.
OI Oleanane Index, 18a+b(H)-oleanane/17a,21b,(H)-hopane.
C29(S/S+R) 24-ethyl-5a,14a,17a(H)-cholestane (20S)/24-ethyl-5a,14a,17a(H)-cholestane (20S)+(20R).
C28/C29 24-methyl-5a,14a,17a(H)-cholestane (20R)/24-ethyl-5a,14a,17a(H)-cholestane (20R).
RI triaromatic sterane/methylchrysene.
Florence L. Wong
United States Geological Survey (USGS)
Geologist, GIS Coordinator
USGS, MailStop 999, 345 Middlefield Road
Menlo Park, CA 94025-3561
USA
(650) 329-5327 (voice)
(650) 329-5190 (FAX)
fwong@usgs.gov
These data are intended for science researchers, students, policy makers, and the general public. The data can be used with geographic information systems (GIS) software to display geologic and oceanographic information about the shallower areas of the Monterey Bay National Marine Sanctuary.
Kvenvolden, Keith.A., Hostettler, Francis .D. , Rosenbauer, Robert J. , Lorenson, Thomas .D. , Castle, William T. , and Sugarman, Susan, 2001, Hydrocarbons in near-surface sediments of the Monterey Bay National Marine Sanctuary: Marine Geology xx, yy.
Complete
Point features present.
Are there legal restrictions on access or use of the data?
- Access_Constraints:
- None
- Use_Constraints:
- Please recognize the U.S. Geological Survey (USGS) as the source of this information.
Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data.
The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials.
This information is not intended for navigational purposes.
Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
United States Geological Survey (USGS)
c/o Florence L. Wong
Geologist, GIS Coordinator
USGS, MailStop 999, 345 Middlefield Road
Menlo Park, CA 94025-3561
USA
(650) 329-5327 (voice)
(650) 329-5190 (FAX)
fwong@usgs.gov
USGS Open-File Report 01-179
Please recognize the U.S. Geological Survey (USGS) as the source of this information.Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data.
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials.
| Data format: | hydrocarbon analyses of samples in format ArcInfo (version 8.0.2) Size: 0.01 megabytes |
|---|---|
| Network links: |
<http://geopubs.wr.usgs.gov/open-file/of01-179/> |
United States Geological Survey (USGS)
c/o Florence L. Wong
Geologist, GIS Coordinator
USGS, MailStop 999, 345 Middlefield Road
Menlo Park, CA 94025-3561
USA
(650) 329-5327 (voice)
(650) 329-5190 (FAX)
fwong@usgs.gov