Mineral Resources On-Line Spatial Data
Mineral Resources > Online Spatial Data > K/Ar ages from the National Geochronological Database
| Label | Statistics | Description |
|---|---|---|
| AGE |  | Age of sample in millions of years (m.y.) |
| ERROR | | Analytical error of calculated age |
| K2OPCT | | percent K20 |
| AR40MOL | | radiogenic 40Ar expressed as mol/gm scaled by 1.0E-10 |
| ARRADPCT | | Percent radiogenic Ar |
| PRECISION_ | | Description of location precision |
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://tin.er.usgs.gov/karage/about.php?group=Analytic+result
Page Contact Information: pschweitzer@usgs.gov
Page Last modified: 16:43 on 16-Oct-2009
