Geochemistry of rock samples from the National Geochemical Database

Metadata Updated: November 12, 2020

This data set contains geochemical data for rock samples collected by U.S. Geological Survey (USGS) personnel and analyzed either in the analytical laboratories of the Geologic Discipline of the USGS or by contract with commercial analytical laboratories. These data represent analyses of rock samples collected in support of various USGS programs. In addition to recent data, this data set includes archived geochemical data originally entered into the in-house Rock Analysis Storage System (RASS) database (used by the Geologic Discipline from the mid-1960's through the late-1980's) and the in-house PLUTO database (used by the Geologic Discipline from the mid-1970's through the mid-1990's). All of these data are maintained in the Oracle-based National Geochemical Database (NGDB). A retrieval from the NGDB was used to generate this data set.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Dates

Metadata Date December 7, 2016
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Reference Date(s) January 1, 2008 (publication)
Frequency Of Update VARIABLE TO ANNUAL, AT BEST. THE NATIONAL GEOCHEMICAL DATABASE IS CURRENTLY BEING UPDATED ANNUALLY WITH NEW DATA ALTHOUGH THERE IS A DELIBERATE LAG TIME OF 2-5 YEARS BEFORE RECENT DATA ARE ADDED. THE ERROR-IDENTIFICATION AND CORRECTION PROCESS CONTINUES TO GENERATE CHANGES AT EPISODIC INTERVALS. MOST CHANGES ARE PRIMARLY RELATED TO 1) ADDITIONAL INFORMATION ON THE EXACT SAMPLE MEDIUM ANALYZED, 2) ADDING LOCATION COORDINATES WHERE THERE WERE NONE, AND 3) CORRECTING LOCATION COORDINATES KNOWN TO BE INACCURATE.

Metadata Source

Harvested from DOI Open Data

Additional Metadata

Resource Type Dataset
Metadata Date December 7, 2016
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Reference Date(s) January 1, 2008 (publication)
Responsible Party U.S. Geological Survey (Point of Contact)
Contact Email
Guid
Access Constraints Use Constraints: The U.S. Geological Survey makes no warranties related to the accuracy of the data and users are required to determine the suitability of use for any particular purpose., Access Constraints: None
Bbox East Long 179.9
Bbox North Lat 84.2
Bbox South Lat -85.5
Bbox West Long -180
Coupled Resource
Frequency Of Update VARIABLE TO ANNUAL, AT BEST. THE NATIONAL GEOCHEMICAL DATABASE IS CURRENTLY BEING UPDATED ANNUALLY WITH NEW DATA ALTHOUGH THERE IS A DELIBERATE LAG TIME OF 2-5 YEARS BEFORE RECENT DATA ARE ADDED. THE ERROR-IDENTIFICATION AND CORRECTION PROCESS CONTINUES TO GENERATE CHANGES AT EPISODIC INTERVALS. MOST CHANGES ARE PRIMARLY RELATED TO 1) ADDITIONAL INFORMATION ON THE EXACT SAMPLE MEDIUM ANALYZED, 2) ADDING LOCATION COORDINATES WHERE THERE WERE NONE, AND 3) CORRECTING LOCATION COORDINATES KNOWN TO BE INACCURATE.
Licence These data are released on the condition that neither the U.S. Geological Survey (USGS) nor the United States Government may be held liable for any damages resulting from authorized or unauthorized use. The USGS provides these data "as is" and makes no guarantee or warranty concerning the accuracy of information contained in the data. The USGS further makes no warranties, either expressed or implied as to any other matter, whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 1963-01-01
Temporal Extent End 2003-01-01

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