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Géochronology of Quaternary tephra deposits in Tephra studies.

Auteurs :
NAESER, C. W.
BRIGGS, N. D.
OBRADOVICH, J. D.
IZETT, G. A.
SELF, S.
SPARKS, R. S. J.
NATO Advanced Study Institute, International

Description :
Three radiometric methods have been used to date Quaternary tephra: fission-track (F-T), K-Ar, and radiocarbon (C-14). The fission-track and K-Ar methods provide direct ages for the tephra because they date phenocrysts from the source magma that were deposited by the eruption cloud. Radiocarbon dating provides only indirect ages because the carbon used in this method comes from material, such as pre-existing wood, included in the tephra during deposition or collected from underlying or overlying strata.


Type de document :
Congrès

Source :
Tephra studies as a tool in quaternary research, 1980, p. 13-47, Références bibliographiques : 102 réf.

Date :
1981

Editeur :
Pays édition : Inconnu

Langue :
Anglais
Droits :
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