U- and Th-series disequilibria in coastal infill sediments from Praia da Rocha (Algarve Region, Portugal) : a contribution to the study of late Quaternary weathering and erosion
U- and Th-series disequilibria observed in a sequence of infill sediments from Praia da Rocha, southern Portugal, were used in combination with geochemical and particle size data to investigate sediment provenance with a view to resolving the late Quaternary weathering and erosion history of the Algarve region, and the stratigraphy of coastal karstic exposures of the Faro/Quarteira (FQ) formation. The red infill units can be distinguished from the brown and buff units on the basis of their lower residual U- and Th- concentrations, their differing post-depositional histories, and their greater degree of sediment processing.
Article of periodic
published at : Geomorphology / ISSN 0169-555X
Editor : Elsevier, Amsterdam - PAYS-BAS (1987)
Millesime : 1999, vol. 26, no4 [pp. 223-238]
Bibliographic references : 54 ref.
Collation : Illustration ;
INIST-CNRS, Cote INIST : 21151