Mineral Resources On-Line Spatial Data
Interactive maps > Data download > Radiometric ages of rocks from Alaska
| Sample identification | ||
|---|---|---|
| ID | Unique record identifier | |
| SAMPLE | Sample ID from published source. If none was given in the cited source, then a sample id was created for this database. | |
| Geographic location | ||
| QUAD | Name of 1:250,000 scale quadrangle | |
| LATITUDE | Latitude in decimal degrees | |
| LONGITUDE | Longitude in decimal degrees, west longitude negative | |
| Processing information | ||
| METHOD | Isotopic dating method | |
| COMMENT | Field for free text. | |
| REF | Reference of data sample. | |
| Sample characteristics | ||
| ROCK | Rock name or type | |
| MINERAL | Mineral or phase dated from sample; or denotes that date is calculated from an isochron. | |
| Analytic result | ||
| OAGE | ||
| AGE_MY | Age estimate of the sample in millions of years | |
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://tin.er.usgs.gov/akages/about.php
Page Contact Information: pschweitzer@usgs.gov
Page Last modified: 11:37 on 20-Dec-2007
