Reports

Major Carbon-14 Deficiency in Modern Snail Shells from Southern Nevada Springs

Science  06 Apr 1984:
Vol. 224, Issue 4644, pp. 58-61
DOI: 10.1126/science.224.4644.58

Abstract

Carbon-14 contents as low as 3.3 ± 0.2 percent 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 HCO3- 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 freshwater biogenic carbonates.

Related Content