Age and geomorphic history of Meteor Crater, Arizona, from cosmogenic 36Cl and 14C in rock varnish

Fred M. Phillips; Marek G. Zreda; Stewart S. Smith; David Elmore; Peter W. Kubik; Ronald Dorn; David J. Roddy

doi:10.1016/0016-7037(91)90387-K

Age and geomorphic history of Meteor Crater, Arizona, from cosmogenic ³⁶Cl and ¹⁴C in rock varnish

Fred M. Phillips, Marek G. Zreda, Stewart S. Smith, David Elmore, Peter W. Kubik, Ronald Dorn, David J. Roddy

Geographical Sciences and Urban Planning, School of (SGSUP)

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78 Scopus citations

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.

Original language	English (US)
Pages (from-to)	2695-2698
Number of pages	4
Journal	Geochimica et Cosmochimica Acta
Volume	55
Issue number	9
DOIs	https://doi.org/10.1016/0016-7037(91)90387-K
State	Published - Sep 1991

ASJC Scopus subject areas

Geochemistry and Petrology

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title = "Age and geomorphic history of Meteor Crater, Arizona, from cosmogenic 36Cl and 14C in rock varnish",

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.",

author = "Phillips, {Fred M.} and Zreda, {Marek G.} and Smith, {Stewart S.} and David Elmore and Kubik, {Peter W.} and Ronald Dorn and Roddy, {David J.}",

year = "1991",

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T1 - Age and geomorphic history of Meteor Crater, Arizona, from cosmogenic 36Cl and 14C in rock varnish

AU - Phillips, Fred M.

AU - Zreda, Marek G.

AU - Smith, Stewart S.

AU - Elmore, David

AU - Kubik, Peter W.

AU - Dorn, Ronald

AU - Roddy, David J.

PY - 1991/9

Y1 - 1991/9

N2 - 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.

AB - 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.

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JO - Geochimica et Cosmochimica Acta

JF - Geochimica et Cosmochimica Acta

IS - 9

ER -

Age and geomorphic history of Meteor Crater, Arizona, from cosmogenic ³⁶Cl and ¹⁴C in rock varnish

Abstract

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