Abstract
The investigation of many problems in geology requires radiometric ages which need not be precise provided they are reliable and preferably cheap and quick. Such first-order ages can be determined on Holocene molluscs at 1/100 the cost of conventional 14C ages and in the space of a few hours by trapping CO 2 from the shell carbonate in an organic base for assay in a liquid scintillation counter. Using standard laboratory glassware and a counter with preset channels the technique gives ages for the last 8000 years with a standard error (2σ) of 1500 years or less.
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