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U.S. Department of Energy
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Major carbon-14 deficiency in modern snail shells from southern Nevada springs

Journal Article · · Science (Washington, D.C.); (United States)

Carbon-14 contents as low as 3.3 +/- 0.2% modern (apparent age, 27,000 years) measured from the shells of snails Melanoides tuberculatus living in artesian springs in southern Nevada are attributed to fixation of dissolved HCO/sub 3//sup -/ with which the shells are in carbon isotope equilibrium. Recognition of the existence of such extreme deficiencies is necessary so that erroneous ages are not attributed to fresh water biogenic carbonates. 2 figures, 1 table.

Research Organization:
Geological Survey, Reston, VA
OSTI ID:
6676858
Journal Information:
Science (Washington, D.C.); (United States), Journal Name: Science (Washington, D.C.); (United States) Vol. 224; ISSN SCIEA
Country of Publication:
United States
Language:
English