| Abstract: | Argon-40-argon-39 single-crystal dating of young (5000 to 30,000 years ago) volcanic ash layers erupted from the Mono Craters, California, shows that the method can yield meaningful ages in Holocene tephra. Because of ubiquitous xenocrystic contamination, the data do not form isochrons but plot in wedge-shaped regions on an argon isotopic diagram. The upper boundary of the region is an isochron matching the 14C-derived age of the eruption. Such contamination-related patterns may be common in dating young materials by the single-crystal method. Argon dating by this method can help refine the time scale of physical and biological evolution over the past 100,000 years. |
| Genre: | Article |
| ProdID: | 70018156 |
| Citation Author: | Chen, Y.; Smith, P. E.; Evensen, N. M.; York, D.; Lajoie, K. R. |
| Citation Contributing Office: | |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | |
| Citation End Page: | 1178 |
| Citation Issue: | 5290 |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | Science |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | 3 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | The edge of time: Dating young volcanic ash layers with the 40Ar- 39Ar laser probe; 1996; Article; Journal; Science; Chen, Y.; Smith, P. E.; Evensen, N. M.; York, D.; Lajoie, K. R. |
| Citation Start Page: | 1176 |
| Citation Volume: | 274 |
| Citation Year: | 1996 |
| Type: | citation/reference |
| Text: | The edge of time: Dating young volcanic ash layers with the 40Ar- 39Ar laser probe; 1996; Article; Journal; Science; Chen, Y.; Smith, P. E.; Evensen, N. M.; York, D.; Lajoie, K. R. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1126/science.274.5290.1176 |
| Date Other: | Mon, 1 Jan 1996 00:00 -0600 |
| Publisher: | |
