| 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. |
| Genre: | Article |
| ProdID: | 70013901 |
| Citation Author: | Riggs, A. C. |
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| Citation End Page: | 61 |
| Citation Issue: | 4644 |
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| Citation Language: | English |
| Citation Larger Work Title: | Science |
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| Citation Number Of Pages: | 4 |
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| Citation Search Results Text: | Major carbon-14 deficiency in modern snail shells from southern Nevada springs; 1984; Article; Journal; Science; Riggs, A. C. |
| Citation Start Page: | 58 |
| Citation Volume: | 224 |
| Citation Year: | 1984 |
| Type: | citation/reference |
| Text: | Major carbon-14 deficiency in modern snail shells from southern Nevada springs; 1984; Article; Journal; Science; Riggs, A. C. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sun, 1 Jan 1984 00:00 -0600 |
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