Mineral Resources On-Line Spatial Data

National Geochronological Database

Radiometric and fission-track age determinations of geologic materials from the continental US and Alaska

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Continental US Alaska
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Options for downloading the entire data set depend on what software you want to use:
Geographic information system
geochron.zip: Shapefile, 2.8 MB expands to 56 MB
All records, all tables, fields longer than 255 characters truncated
geochron-gdb.zip: File geodatabase, 3 MB expands to 18 MB
All records, all tables
Spreadsheets or relational database
geochron-csv.zip: Comma-delimited text, 1.8 MB zipped, expands to 14 MB
All records, all tables. See data dictionary for explanation of tables and fields.
[Outline] - [Questions & Answers] - [Plain text]
About the database fields
Database structure (tables and field categories)
USGS Open-File Report 2003-236
National Geochronological Database

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Page Contact Information: Peter Schweitzer
Page Last Modified: Wednesday, 15-Feb-2017 10:06:31 MST