Age and geomorphic history of Meteor Crater, Arizona, from cosmogenic 36Cl and 14C in rock varnish
Geochimica et Cosmochimica Acta
By: F. M. Phillips, M.G. Zreda, S.S. Smith, D. Elmore, P.W. Kubik, R.I. Dorn, and D. J. Roddy
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Abstract
Using cosmogenic 36Cl buildup and rock varnish radiocarbon, we have measured the exposure age of rock surfaces at Meteor Crater, Arizona. Our 36Cl measurements on four dolomite boulders ejected from the crater by the impact yield a mean age of 49.7 ± 0.85 ka, which is in excellent agreement with an average age of 49 ± 3 ka obtained from thermoluminescence studies on shock-metamorphosed dolomite and quartz. These ages are supported by undetectably low 14C in the oldest rock varnish sample.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Age and geomorphic history of Meteor Crater, Arizona, from cosmogenic 36Cl and 14C in rock varnish |
| Series title | Geochimica et Cosmochimica Acta |
| DOI | 10.1016/0016-7037(91)90387-K |
| Volume | 55 |
| Issue | 9 |
| Year Published | 1991 |
| Language | English |
| Publisher | Elsevier |
| Description | 4 p. |
| First page | 2695 |
| Last page | 2698 |
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