title: The accumulation of cosmogenic chlorine-36 in rocks: a method for surface exposure dating.
abstract: Because of the reaction of cosmic rays with elements in minerals, chlorine-36 accumulates in rocks exposed at the earth's surface. This suggests that the ratio of chlorine-36 to stable chloride can be used as a geochronometer. Reasonable agreement has been obtained between measurements of chlorine-36 in volcanic rocks of known age and calculations of chlorine-36 production based on rock composition and cosmicray flux. The buildup of chlorine-36 should be a useful means for measuring the surface exposure time of young volcanic rocks and geomorphic features in the age range of 10(3) to 10(6) years.
authors.forename: F M
authors.initials: FM
authors.lastname: Phillips
authors.forename: B D
authors.initials: BD
authors.lastname: Leavy
authors.forename: N O
authors.initials: NO
authors.lastname: Jannik
authors.forename: D
authors.initials: D
authors.lastname: Elmore
authors.forename: P W
authors.initials: PW
authors.lastname: Kubik