Physics
Scientific paper
Jan 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995e%26psl.129..193b&link_type=abstract
Earth and Planetary Science Letters (ISSN 0012-821X), vol. 129, no. 1-4, p. 193-202
Physics
58
Beryllium Isotopes, Cosmic Rays, Forests, Geochemistry, Puerto Rico, Rivers, Sediments, Soil Erosion, Structural Basins, Biomass, Climate, Sediment Transport, Topography, Weathering
Scientific paper
We present a simple method for estimation of long-term mean denudation rates using in situ-produced cosmogenic Be-10 in fluvial sediments. Procedures are discussed to account for the effects of soil bioturbation, mass wasting and attenuation of cosmic rays by biomass and by local topography. Our analyses of Be-10 in quartz from bedrock outcrops, soils, mass-wasting sites and riverine sediment from the Icacos River basin in the Luquilo Experimental Forest, Puerto Rico, are used to characterize denudation for major landform elements in that basin. The Be-10 concentration of a discharge-weighted average of size classes of river sediment corresponds to a long-term average denudation of approx. equals 43 m/Ma, consistent with mass balance results.
Brown Erik Thorson
Larsen Matthew C.
Raisbeck Grant M.
Stallard Robert F.
Yiou Françoise
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