Dating fluvial terraces with 10Be and 26Al profiles : application to the Wind River, Wyoming

Cosmogenic isotopes in geomorphology

Auteurs :
HANCOCK, G.S.
ANDERSON, R.S.
CHADWICK, O.A.
FINKEL, R.C.
HARBOR, J.

Description :
Dating depositional surfaces like terraces that are older than the range of 14C is difficult. The AA. employ a cosmogenic radionuclide (CRN) profile technique that addresses a major problem of CRN dating on such surfaces : nuclide inheritance. By measuring 10Be and 26Al profiles, the AA. constrain the exposure age and the mean CRN inheritance for the deposit. Here they report their attempts to date terraces along the Wind River, which are inferred to reflect oscillation between glacial and interglacial conditions in the headwaters, and compare the results with other dating methods.


Type de document :
Article de monographie

Source :
Geomorphology (Amsterdam), issn : 0169-555X, 1999, vol. 27, n°. 1-2, p. 41-60, Collation : Illustration, Références bibliographiques : 41 ref.

Date :
1999

Editeur :
Pays édition : Pays-Bas, Amsterdam, Elsevier