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| Material |
Suggested Size§ |
Minimum Size* |
Maximum Size |
| Wood, charcoal, seeds, plant fragments |
5 mg |
1.0 mg |
50 mg |
| Shells, carbonates |
50 mg |
5 mg |
150 mg |
| Textiles, cloth |
5 mg |
2 mg |
50 mg |
| Pottery |
1 g |
0.5 g |
5 g |
| Bones, teeth † |
1 g |
— |
5 g |
| Organic-rich sediments and soil ‡ |
1 g |
0.1 g |
50 g |
| CO2 gas |
1 cc STP |
0.5 cc STP |
10 cc STP |
| Ground water (DIC) |
2 x 500 ml |
0.25 liter |
2 liter |
| Rocks (in situ), ice |
contact lab |
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* Radiocarbon measurements can be made on as little as 75 micrograms of carbon.
Such measurements represent special cases, and may have larger uncertainties than those discussed in the text.
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§ Older sample and high precision analyses may require additional material.
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† The successful dating of bone samples depends on the degree of preservation.
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‡ The shipment of soils and non-marine sediments from overseas is restricted
by the US Department of Agriculture. The laboratory holds USDA soil permit no. S-4619, which should be cited on the shipping document. Please contact us concerning instructions and any questions on the shipment of these materials. |
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