Rates of erosion and topographic evolution of the Sierra Nevada, California, inferred from cosmogenic Al 26 and Be 10 concentrations

Quantifying rates and timescales of geomorphic processes : part 1. Special issue

Auteurs :
STOCK, G.M.
ANDERSON, R.S.
FINKEL, R.C.
HEIMSATH, A.

Description :
The AA. dated caves in canyon walls, Sierra Nevada, using Al 26/Be 10 dating to document rates of river incision into bedrock, a primary means by which landscapes respond to tectonic forcing. They also measured nuclide concentrations in bare bedrock surfaces to constrain erosion rates of adjacent granitic uplands. By combining these techniques, they derive high-resolution records of erosion, relief production, and paleotopography in the Sierra Nevada over the past 5 Ma. These new records help to link many of the conceptual models put forth to explain the modern topography.


Type de document :
Article de monographie

Source :
Earth surface processes and landforms, issn : 0197-9337, 2005, vol. 30, n°. 8, p. 985-1006, nombre de pages : 22, Collation : Illustration, Références bibliographiques : 77 ref.

Date :
2005

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley