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US Geological Survey, Menlo Park, California Radiocarbon Measurements IV

Published online by Cambridge University Press:  18 July 2016

Deborah A Trimble  and
Stephen W Robinson
Deborah A Trimble
Affiliation:
U S Geological Survey, Menlo Park, California 94025
Stephen W Robinson
Affiliation:
U S Geological Survey, Menlo Park, California 94025
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The Menlo Park Radiocarbon Laboratory utilizes gas proportional counting of carbon dioxide in counters installed 9.5m below the ground surface for background reduction (Robinson, 1977, 1979; Robinson & Trimble, 1981, 1983). The reported results of geologic samples closely follow the guidelines of Stuiver and Polach (1977). The standard errors for analyses earlier than USGS-500 are based solely upon counting statistics, while later analyses include estimates of uncertainty in voltage, pressure, temperature, and δ13C. Unless otherwise noted, organic samples are pretreated in NaOH and HCl, and carbonate samples in HCl.

Type
Date Lists
Information
Radiocarbon , Volume 31 , Issue 1 , 1989 , pp. 69 - 84
Copyright
Copyright © The American Journal of Science 

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