Valentine, Brett J.
Elizalde, Ciel
Enomoto, Catherine B.
Hackley, Paul C.
Dulong, Frank T.
Lohr, Celeste D.
20181113
Petroleum geology data from Cenozoic rock samples in the eastern U.S. Gulf Coast collected 2014 to 2016
tabular
Reston, VA
U.S. Geological Survey
https://doi.org/10.5066/P9KWH1NB
The U.S. Geological Survey assessed undiscovered petroleum resources in the downdip Paleogene formations of the U.S. Gulf Coast in 2018. During the assessment new data and information were collected to evaluate thermal maturity, source rock character, and unconventional reservoir rock prospectivity for the Cenozoic-aged section in south Louisiana. Samples were analyzed using multiple analytical approaches, including programmed pyrolysis (Rock-Eval), Leco TOC, organic petrographic analysis including vitrinite reflectance (Ro, %), and X-ray diffraction mineralogy.
The U.S. Geological Survey assessed undiscovered petroleum resources in the downdip Paleogene formations of the U.S. Gulf Coast in 2018. During the assessment new data and information were collected to evaluate thermal maturity, source rock character, and unconventional reservoir rock prospectivity for the Cenozoic-aged section in south Louisiana. Samples were analyzed using multiple analytical approaches, including programmed pyrolysis (Rock-Eval), Leco TOC, organic petrographic analysis including vitrinite reflectance (Ro, %), and X-ray diffraction mineralogy.
2014
2016
publication date
As needed
-93.681941891301
-88.880916500864
30.325738553971
29.075645821749
USGS Thesaurus
mineralogy
thermal maturity
organic content
kerogen
geochemistry
Total Organic Carbon
TOC
S1
S2
S3
Tmax
HI
OI
PI
Hydrogen Enrichment Index
Oxygen Enrichment Index
Production Index
Transformation Ratio
Total Hydrocarbon Generation Potential
Rock-Eval
pyrolysis
hydrocarbons
Ro
vitrinite reflectance
LOI
Loss on Ignition
Quartz
Feldspar
Carbonate
Illite
Smectite
Kaolinite
Chlorite
Pyrite
USGS Metadata Identifier
USGS:5bc48daee4b0fc368eba02f7
Geographic Names Information System (GNIS); Official Protraction Diagrams (OPDs) and Leasing Maps (LMs) & Supplemental Official OCS Block Diagrams (SOBDs)
Louisiana
Vermilion Parish
St. Mary Parish
Calcasieu Parish
Acadia Parish
Terrebonne Parish
Cameron Parish
St. Bernard Parish
Geolex - U.S. Geologic Names Lexicon
Vicksburg Formation
Wilcox Formation
Midway Formation
USGS Thesaurus: time periods
Eocene
Oliocene
Miocene
none
none
Brett J. Valentine
U.S. Geological Survey
Physical Scientist
mailing and physical
12201 Sunrise Valley Dr, Mail Stop 956
Reston
VA
20192
United States
703-648-6480
bvalentine@usgs.gov
No formal attribute accuracy tests were conducted
No formal logical accuracy tests were conducted
Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
Horizontal coordinates were cross-checked with publicly available sources listed in processing steps in the metadata.
No formal positional accuracy tests were conducted
Appropriate rock core and cuttings samples were identified from online databases listing holdings of the individual State core repositories. Samples were identified from the Integrated Core and Log Database (http://igor.beg.utexas.edu/crc2/) of the Texas Bureau of Economic Geology.
2014
Sampling trips were planned in consultation with staff at TX BEG.
2014
Vitrinite and solid bitumen reflectance measurements conducted at USGS followed the ASTM D7708 test method (ASTM, 2014).
ASTM, 2014, D7708 Standard test method for microscopical determination of the reflectance of vitrinite dispersed in sedimentary rocks, petroleum products, lubricants, and fossil fuels; gaseous fuels; coal and coke, sec. 5, v. 05.06. ASTM International, West Conshohocken, PA.
2015
Programmed pyrolysis and LECO total organic carbon (TOC) analysis followed typical methods (Espitalié et al., 1977). Programmed pyrolysis measurements and LECO TOC were collected using either Rock-Eval II at Weatherford Laboratories or by Hawk at the USGS. Samples for pyrolysis were not extracted or acidified prior to pyrolysis.
Espitalié, J., Laporte, J.L., Madec, M., Marquis, F., Leplat, P., and Paulet, J., 1977, Méthode rapide de caractérisation des rochès, de leur potential pétrolier et de leur degree d’évolution: Revue de L’Institut Français du Pétrole, v. 32, p. 23–43.
2014
Semi-quantitative X-ray diffraction (XRD) mineralogy was determined on low temperature ash (LTA) residues according to typical methods (Hosterman and Dulong, 1989) at the USGS. Results are accurate to approximately ± 5 weight percent.
Hosterman, J.W., and Dulong, F.T., 1989, A computer program for semi-quantitative mineral analysis by X-ray powder diffraction, in: Pevear, D.R., Mumpton, F.A. (Eds.), Quantitative Mineral Analysis of Clays. Clay Minerals Society Workshop Lectures, pp. 38–50.
2015
A database was created containing data for, and not limited to, sample dates, descriptions, source, depths; TOC; rock-eval; XRD mineralogy; vitrinite reflectance; location; and quality control documentation.
2015
Geographic coordinates of each sample were obtained from SONRIS (http://sonris.com/).
2014
FIPS: 019, 023, 113, 001, 101, 109, 087
Point
0.01
0.01
Decimal degrees
local surface
1.0
feet
Explicit depth coordinate included with horizontal coordinates
Petroleum geology data from Cenozoic rock samples in the eastern U.S. Gulf Coast collected 2014 to 2016
Provisional data and information collected to evaluate thermal maturity, source rock character and unconventional reservoir rock prospectivity for the deep downdip Paleogene-aged section in south Louisiana. Samples were analyzed using multiple analytical approaches, including programmed pyrolysis (Rock-Eval), Leco TOC, organic petrographic analysis including vitrinite reflectance (Ro, %), and X-ray diffraction mineralogy.
Brett Valentine, Frank Dulong, Weatherford Laboratories
API
A unique and permanent identification number assigned by the American Petroleum Institute. The first two numbers identify the state surface location of the well; the third through fifth digits identify the county surface location of the well; the sixth through tenth digits are a unique set of numbers assigned within the county in which the well is drilled; the eleventh and twelfth digits are the sidetrack code; and thirteenth and fourteenth digits, which are optional, represent a well event sequence code, such as a recompletion.
American Petroleum Institute, State regulatory agencies, and Professional Petroleum Data Management
American Petroleum Institute
Louisiana: http://sonris.com/dataaccess.asp
Sample_ID
Unique USGS field identification number assigned to each sample. The Sample_ID follows the format “operator” “well number” “lease name” “sample depth(s)”.
Producer defined.
Sample identification name assigned to rock sample by USGS during collection process.
Sample_Code
Unique USGS sample identification numbers assigned to each sample during laboratory analysis.
Producer defined.
Unique code assigned to rock sample by USGS during laboratory analysis.
Sample_Type
The type of sample used for analysis were cuttings.
Producer defined.
cuttings
Small pieces of rock that break away due to the action of the drill bit teeth.
Schlumberger Oilfield Glossary: http://www.glossary.oilfield.slb.com/
Description
The color and lithology description of the collected sample.
Producer defined.
A textual, qualitative description of the color and lithology of the rock sample.
Subsystem
Geologic age (system or subsystem) of formation from which rock sample was taken.
National Geologic Map Database Geolex: https://ngmdb.usgs.gov/Geolex/search
Eocene
Geologic age of sampled interval is Eocene
National Geologic Map Database Geolex: https://ngmdb.usgs.gov/Geolex/search
Oligocene
Geologic age of sampled interval is Oligocene.
National Geologic Map Database Geolex: https://ngmdb.usgs.gov/Geolex/search
Miocene
Geologic age of sampled interval is Miocene.
National Geologic Map Database Geolex: https://ngmdb.usgs.gov/Geolex/search
Miocene - Oligocene
Based on well log interpretation geologic age of sampled interval is Miocene-Oligocene.
National Geologic Map Database Geolex: https://ngmdb.usgs.gov/Geolex/search
not determined
Geologic age was not determined as a well log was not available for the well.
Producer-defined
Formation
Name of the geologic formation from which rock sample was taken. “not determined” means the formation was not determined for this sample.
National Geologic Map Database Geolex: https://ngmdb.usgs.gov/Geolex/search
Vicksburg Fm.
Rock sample was taken from the Vicksburg Formation.
Producer defined.
Wilcox Fm.
Rock sample was taken from the Wilcox Formation.
Producer defined.
Midway Fm.
Rock sample was taken from the Midway Formation.
Producer defined.
not determined
The formation was not determined for this sample.
Producer defined.
Member
Name of member within geologic formation from which rock sample was taken; in some instances, the names used follow State geological survey or operator usage and are not necessarily formally recognized names.
Producer defined.
not determined
The formation was not determined for this sample.
Producer defined.
Longitude
Location of sample in longitude decimal degrees. A horizontal value for longitude recorded in regulatory agency database. In this dataset the longitude values range from -93.24095 to -89.41909 decimal degrees. Datum used was NAD83.
The National Map: https://nationalmap.gov/index.html
-180
180
degrees. Attribute_Meaurement_Resolution is 0.000001
Latitude
Location of sample in latitude decimal degrees. A horizontal value for latitude recorded in regulatory agency database. In this dataset the latitude values range from 29.52753 to 30.24440 decimal degrees. Datum used was NAD83.
The National Map: https://nationalmap.gov/index.html
-90
90
degrees. Attribute_Meaurement_Resolution is 0.000001
Sample_Depth
Depth of sampled interval, in measured depth (feet).
Producer defined.
0
45000.00
feet
Source
The source of the sample was from the Texas Bureau of Economic Geology (BEG).
Producer defined.
BEG
Sample source is the Texas Bureau of Economic Geology.
Producer defined.
State_Name
State where well was drilled from which rock sample was collected.
The National Map (https://nationalmap.gov/boundaries.html)
Louisiana
A data point collected in the U.S. State of Louisiana.
https://nationalmap.gov/boundaries.html
Parish_Name
Parish name where well was drilled from which rock sample was collected.
The National Map (https://nationalmap.gov/boundaries.html)
The National Map
https://nationalmap.gov/boundaries.html
TOC%
Total Organic Carbon in weight percent; maximum value is reported. “no data” means there was no analysis performed on this sample. “Below RL” means below the reporting limit of 0.2 weight percent if Leco TOC data was measured by the USGS.
Producer defined.
0.13
8.79
weight percent
no data
No analysis performed on this sample.
Producer defined.
S1
S1 values (free hydrocarbons), measured in mg HC/g of rock; the free hydrocarbons already generated that are volatilized out of the rock without cracking the kerogen. “no data” means there was no analysis performed on this sample.
Espitalié, J., Laporte, J.L., Madec, M., Marquis, F., Leplat, P., and Paulet, J., 1977, Méthode rapide de caractérisation des rochès, de leur potential pétrolier et de leur degree d’évolution: Revue de L’Institut Français du Pétrole, v. 32, p. 23–43.
0.03
15.68
mg HC/g rock
no data
No analysis performed on this sample.
Producer defined.
S2
Values (generated hydrocarbons), measured in mg HC/g of rock; the amount of hydrocarbons generated through thermal cracking of kerogen and heavy hydrocarbons. A S2 value of greater than 5 is considered to have good source rock generative potential. “no data” means there was no analysis performed on this sample.
Espitalié, J., Laporte, J.L., Madec, M., Marquis, F., Leplat, P., and Paulet, J., 1977, Méthode rapide de caractérisation des rochès, de leur potential pétrolier et de leur degree d’évolution: Revue de L’Institut Français du Pétrole, v. 32, p. 23–43.
0.1
12.74
mg HC/g rock
no data
No analysis performed on this sample.
Producer defined.
S3
Values (generated carbon dioxide) measured in mg CO2/g of rock; the oxygen-containing compounds (trapped CO2) released during pyrolysis up to a temperature of 390°C. “no data” means there was no analysis performed on this sample.
Espitalié, J., Laporte, J.L., Madec, M., Marquis, F., Leplat, P., and Paulet, J., 1977, Méthode rapide de caractérisation des rochès, de leur potential pétrolier et de leur degree d’évolution: Revue de L’Institut Français du Pétrole, v. 32, p. 23–43.
0.11
1.57
mg CO2/g rock
no data
No analysis performed on this sample.
Producer defined.
Tmax
The temperature (°C) of maximum release of hydrocarbons during Rock-Eval kerogen pyrolysis; this value occurs at the top of the S2 peak. The oil window using Tmax measurements ranges from 435 to 470°C. "error" means a machine-read error due to a low or absent S2 peak in the pyrogram. “no data” means there was no analysis performed on this sample.
Espitalié, J., Laporte, J.L., Madec, M., Marquis, F., Leplat, P., and Paulet, J., 1977, Méthode rapide de caractérisation des rochès, de leur potential pétrolier et de leur degree d’évolution: Revue de L’Institut Français du Pétrole, v. 32, p. 23–43.
334
448
degrees Celsius
no data
No analysis performed on this sample.
Producer defined.
Calc_%VRo
Calculated percent VRo=(0.01867*Tmax)-7.306 (Laughrey, 2014); "error" means invalid value for Tmax. “not calculated” means no Tmax data available for calculation of percent VRo.
Laughrey, C.D., 2014, Introductory geochemistry for shale gas, condensate-rich shales, and tight oil reservoirs: URTeC Annual Meeting Short Course, Colorado Convention Center, Denver, Colorado, August 2014, 325 p.
0.11
1.06
percent
error
Invalid value for Tmax to calculate %VRo.
Producer defined.
no data
No Tmax data available to calculate %VRo.
Producer defined.
HI
The ratio of hydrogen (S2 in mg HC/g) to TOC, as expressed in the formula [HI = (S2/TOC) x100].The HI represents the quantity of pyrolyzable organic compounds or hydrocarbons and is proportional to the amount of hydrogen contained within the kerogen; a HI greater than 300 is considered to be in the oil window. “error” means an input value is too low for the calculation.
Espitalié, J., Laporte, J.L., Madec, M., Marquis, F., Leplat, P., and Paulet, J., 1977, Méthode rapide de caractérisation des rochès, de leur potential pétrolier et de leur degree d’évolution: Revue de L’Institut Français du Pétrole, v. 32, p. 23–43.
73
485
mg HC/g TOC
no data
No analysis performed on this sample.
Producer defined.
OI
The ratio of oxygen (S3 in mg HC/g) to TOC, as expressed in the formula [OI = (S3/TOC) x100]. “no data” means there was no analysis performed on this sample. “error” means an input value is too low for the calculation.
Espitalié, J., Laporte, J.L., Madec, M., Marquis, F., Leplat, P., and Paulet, J., 1977, Méthode rapide de caractérisation des rochès, de leur potential pétrolier et de leur degree d’évolution: Revue de L’Institut Français du Pétrole, v. 32, p. 23–43.
16
197
mg CO2/g TOC
no data
No analysis performed on this sample.
Producer defined.
S2/S3
The ratio of S2 and S3 helps determine the type of organic matter, as the different types of kerogens produce different value ranges. “no data” means there was no analysis performed on this sample. “error” means an input value is too low for the calculation.
Espitalié, J., Laporte, J.L., Madec, M., Marquis, F., Leplat, P., and Paulet, J., 1977, Méthode rapide de caractérisation des rochès, de leur potential pétrolier et de leur degree d’évolution: Revue de L’Institut Français du Pétrole, v. 32, p. 23–43.
0.4
8.9
mg HC/mg CO2
no data
No analysis performed on this sample.
Producer defined.
S1*100/TOC
The index value of the free hydrocarbons in a sample, and called Oil Saturation Index in mg HC/g TOC. “no data” means there was no analysis performed on this sample. “error” means an input value is too low for the calculation.
Espitalié, J., Laporte, J.L., Madec, M., Marquis, F., Leplat, P., and Paulet, J., 1977, Méthode rapide de caractérisation des rochès, de leur potential pétrolier et de leur degree d’évolution: Revue de L’Institut Français du Pétrole, v. 32, p. 23–43.
13
862
mg HC/g TOC
no data
No analysis performed on this sample.
Producer defined.
PI
The ratio of the amount of petroleum already generated by the kerogen to the total amount of petroleum that the kerogen is capable of generating. The PI is expressed by the formula [PI = S1/(S1+S2)]; this relationship is used to characterize the evolution of the organic matter because PI generally will increase with depth. The oil window generally is within a PI range of 0.1–0.4. Maximum value is reported. “no data” means there was no analysis performed on this sample. “error” means an input value is too low for the calculation.
Espitalié, J., Laporte, J.L., Madec, M., Marquis, F., Leplat, P., and Paulet, J., 1977, Méthode rapide de caractérisation des rochès, de leur potential pétrolier et de leur degree d’évolution: Revue de L’Institut Français du Pétrole, v. 32, p. 23–43.
0.09
0.74
Transformation Ratio of (S1/(S1+S2)).
no data
No analysis performed on this sample.
Producer defined.
Meas_%VRo
Indigenous vitrinite reflectance, which is the population in the sample that is used to infer thermal maturity. “no data” means there was no analysis performed on this sample.
Producer defined.
0.6
1.14
percent
no data
No analysis performed on this sample.
Producer defined.
no measurement
Sample was evaluated but no measurable vitrinite macerals were found during analysis.
Producer defined
Meas_%BRo
Solid bitumen reflectance, which is the population in the sample that is used to infer thermal maturity. “no data” means there was no analysis performed on this sample. “No SB” means no solid bitumen found in sample.
Producer defined.
0.34
1.68
percent
no data
No analysis performed on this sample.
Producer defined.
no measurement
Sample was evaluated but no measurable solid bitumen was found during analysis.
Producer defined.
LOI%
Loss on ignition (LOI) content obtained from the low temperature ashing (LTA) method, in weight percent. “no data” means there was no analysis performed on this sample.
Producer defined.
0.00
3.77
percent
no data
No analysis performed on this sample.
Producer defined.
QTZ%
Weight percent of quartz mineral composition from X-ray diffraction semi-quantitative mineralogy. “no data” means there was no analysis performed on this sample.
Hosterman, J.W., and Dulong, F.T., 1989, A computer program for semi-quantitative mineral analysis by X-ray powder diffraction, in: Pevear, D.R., Mumpton, F.A. (Eds.), Quantitative Mineral Analysis of Clays. Clay Minerals Society Workshop Lectures, pp. 38–50.
0
99
weight percent
no data
No analysis performed on this sample.
Producer defined.
FLD%
Weight percent of feldspar mineral composition from X-ray diffraction semi-quantitative mineralogy. “no data” means there was no analysis performed on this sample.
Hosterman, J.W., and Dulong, F.T., 1989, A computer program for semi-quantitative mineral analysis by X-ray powder diffraction, in: Pevear, D.R., Mumpton, F.A. (Eds.), Quantitative Mineral Analysis of Clays. Clay Minerals Society Workshop Lectures, pp. 38–50.
0
16
weight percent
no data
No analysis performed on this sample.
Producer defined.
CARB%
Weight percent of carbonate mineral composition from X-ray diffraction semi-quantitative mineralogy. “no data” means there was no analysis performed on this sample.
Hosterman, J.W., and Dulong, F.T., 1989, A computer program for semi-quantitative mineral analysis by X-ray powder diffraction, in: Pevear, D.R., Mumpton, F.A. (Eds.), Quantitative Mineral Analysis of Clays. Clay Minerals Society Workshop Lectures, pp. 38–50.
0
11
weight percent
no data
No analysis performed on this sample.
Producer defined.
I/S%
Weight percent of mixed layer illite+smectite mineral composition from X-ray diffraction semi-quantitative mineralogy. “no data” means there was no analysis performed on this sample.
Hosterman, J.W., and Dulong, F.T., 1989, A computer program for semi-quantitative mineral analysis by X-ray powder diffraction, in: Pevear, D.R., Mumpton, F.A. (Eds.), Quantitative Mineral Analysis of Clays. Clay Minerals Society Workshop Lectures, pp. 38–50.
0
23
weight percent
no data
No analysis performed on this sample.
Producer defined.
ILLITE%
Weight percent of illite mineral composition from X-ray diffraction semi-quantitative mineralogy. “no data” means there was no analysis performed on this sample.
Hosterman, J.W., and Dulong, F.T., 1989, A computer program for semi-quantitative mineral analysis by X-ray powder diffraction, in: Pevear, D.R., Mumpton, F.A. (Eds.), Quantitative Mineral Analysis of Clays. Clay Minerals Society Workshop Lectures, pp. 38–50.
0
41
weight percent
no data
No analysis performed on this sample.
Producer defined.
KAOL%
Weight percent of kaolinite mineral composition from X-ray diffraction semi-quantitative mineralogy. “no data” means there was no analysis performed on this sample.
Hosterman, J.W., and Dulong, F.T., 1989, A computer program for semi-quantitative mineral analysis by X-ray powder diffraction, in: Pevear, D.R., Mumpton, F.A. (Eds.), Quantitative Mineral Analysis of Clays. Clay Minerals Society Workshop Lectures, pp. 38–50.
0
22
weight percent
no data
No analysis performed on this sample.
Producer defined.
CHLR%
Weight percent of chlorite mineral composition from X-ray diffraction semi-quantitative mineralogy. “no data” means there was no analysis performed on this sample.
Hosterman, J.W., and Dulong, F.T., 1989, A computer program for semi-quantitative mineral analysis by X-ray powder diffraction, in: Pevear, D.R., Mumpton, F.A. (Eds.), Quantitative Mineral Analysis of Clays. Clay Minerals Society Workshop Lectures, pp. 38–50.
0
35
weight percent
no data
No analysis performed on this sample.
Producer defined.
PY%
Weight percent of pyrite mineral composition from X-ray diffraction semi-quantitative mineralogy. “no data” means there was no analysis performed on this sample.
Hosterman, J.W., and Dulong, F.T., 1989, A computer program for semi-quantitative mineral analysis by X-ray powder diffraction, in: Pevear, D.R., Mumpton, F.A. (Eds.), Quantitative Mineral Analysis of Clays. Clay Minerals Society Workshop Lectures, pp. 38–50.
0
4
weight percent
no data
No analysis performed on this sample.
Producer defined.
OTHER%
Weight percent of other minerals composition not accounted for in the previous categories from X-ray diffraction semi-quantitative mineralogy. “no data” means there was no analysis performed on this sample.
Hosterman, J.W., and Dulong, F.T., 1989, A computer program for semi-quantitative mineral analysis by X-ray powder diffraction, in: Pevear, D.R., Mumpton, F.A. (Eds.), Quantitative Mineral Analysis of Clays. Clay Minerals Society Workshop Lectures, pp. 38–50.
0
4
weight percent
no data
No analysis performed on this sample.
Producer defined.
TOTAL_CLAY%
The sum of the weight percent of mixed layer illite+smectite, illite, kaolinite, and chlorite in this sample. “no data” means there was no analysis performed on this sample.
Hosterman, J.W., and Dulong, F.T., 1989, A computer program for semi-quantitative mineral analysis by X-ray powder diffraction, in: Pevear, D.R., Mumpton, F.A. (Eds.), Quantitative Mineral Analysis of Clays. Clay Minerals Society Workshop Lectures, pp. 38–50.
0
57
weight percent
no data
No analysis performed on this sample.
Producer defined.
Collector
Affiliation of person who collected the sample.
Producer defined.
USGS
United States Geological Survey
https://www.usgs.gov/
Publication
Short name of reference from which previously published data were pulled, or “None” representing previously unpublished data.
Producer defined.
Valentine and others, 2015
Short name of reference.
Valentine, B.J., Elizalde, C., Enomoto, C.B., Hackley, P.C., 2015. Organic petrology and geochemistry of Tertiary and Cretaceous strata in southern Louisiana, Gulf of Mexico basin, U.S.A. 32nd Annual Meeting of the Society for Organic Petrology, Vol. 32, ISSN 1060-7250. http://archives.datapages.com/data/tsop/tsop-v32-2015/valentine.htm (Accessed on 9/25/2018)
None
Previously unpublished data.
Producer defined.
Coord_Source
The publicly available source of the surface longitude and latitude, which includes the Mississippi Department of Environmental Quality (MS DEQ) and the Louisiana Strategic Online Natural Resources Information System (SONRIS).
Producer defined.
MS DEQ
Mississippi Dept. of Environmental Quality
http://geology.deq.ms.gov/energy/
SONRIS
Louisiana Strategic Online Natural Resources Information System
http://sonris.com/
Coord_Datum
Datum of the surface longitude and latitude coordinates.
Producer defined.
NAD-83
North American Datum of 1983
https://www.ngs.noaa.gov/PUBS_LIB/NADof1983.pdf
QC_notes
A textual description of quality control that may include when and/or who entered the samples into the database; who performed the analyses; if samples were not submitted for certain analyses; various comments regarding the inputs or results of the analyses; or additional information regarding source of coordinates.
Comments provided by USGS staff who entered information into database.
QC_notes
A textual description of quality control that may include when and/or who entered the samples into the database; who performed the analyses; if samples were not submitted for certain analyses; various comments regarding the inputs or results of the analyses; or additional information regarding source of coordinates.
Producer defined.
A textual description of quality control that may include when and/or who entered the samples into the database; who performed the analyses; if samples were not submitted for certain analyses; various comments regarding the inputs or results of the analyses; or additional information regarding source of coordinates.
GS ScienceBase
U.S. Geological Survey
mailing and physical
Denver Federal Center, Building 810, Mail Stop 302
Denver
CO
80225
USA
1-888-275-8747
sciencebase@usgs.gov
This database has been approved for release by the U.S. Geological Survey (USGS). Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, the database is released on condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use.
The file contains data available in comma separated value (.csv) file format. The user must have software capable of opening and viewing a .csv file.
20200819
Eric A. Morrissey
U.S. Geological Survey
IT Specialist (Internet)
mailing and physical
12201 Sunrise Valley Dr, Mail Stop 956
Reston
VA
20192
United States
703-648-6409
emorriss@usgs.gov
Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998