Scientific Investigations Report 2008–5167
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2008–5167
Table 1. Summary of composite stratigraphic units and time spans as defined by Anderson and Liszewski (1997), Idaho National Laboratory, Idaho.
[Abbreviation: Ka, thousand years]
| Composite stratigraphic unit |
Approximate time span of the unit (Ka) |
|---|---|
| 1 | 5–250 |
| 2 | 250–350 |
| 3 | 350–440 |
| 4 | 440–515 |
| 5 | 515–580 |
| 6 | 580–650 |
| 7 | 650–800 |
| 8–14 | 800–1,800 |
U.S. Department of the Interior | U.S. Geological Survey
URL: http://pubs.usgs.gov/sir/2008/5167
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