Acid oceans may trigger mass extinction Tim Radford Jul 25 |
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counting annual rings to get calendar dates and matching those with measured radiocarbon dates |
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Radiation Measurements |
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Chapter number Chapter 8 |
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this assumption can be complicated because the shape of the OSL signal may be governed by factors other than incomplete light exposure Jain et al |
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Bailey et al |
The calculation of the dose rate introduces uncertainties due to substantial variability being observed in potassium |
uranium and thorium which are the principal sources of environmental radiation |
When extracting fine grains for analysis |
carbonates and organic materials are also first eliminated using dilute HCl and H 2 O 2 |
respectively |
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