Crustal Imaging and Characterization Team
USGS Luminescence Dating Laboratory
| Coarse-Grained | Fine-Grained | |
|---|---|---|
| Alpha (α) | 20-24% | 20% |
| Beta (β) | 45-51% | 48% |
| Gamma (γ) | 25-30% | 26% |
| Cosmic Rays | 3-6% | 3-6% |
| Potassium (K) | ≥21% no α | ≥53% |
| Thorium (Th) | 20% no α | 37% |
| Uranium (U) | 25% no α | 39% |
Next: Sampling
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Mineral Resources |
Eastern / Central / Western / Alaska / Minerals Information |
| Crustal Imaging & Characterization / Spatial Data |
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://crustal.usgs.gov/laboratories/luminescence_dating/sediment_contributions.html
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Page Last Modified: 10-Sep-2008@21:19
