RT Journal Article
T1 A beach-ridge progradation complex reflecting periodicalsea-level and climate variability during the Holocene(Gulf of Almería, Western Mediterranean)
A1 Goy Goy, José Luis
A1 Zazo Cardeña, Caridad
A1 Dabrio, Cristino J.
AB Detailed mapping based on aerial photographs at various scales, analysis of morpho-sedimentary units, and radiocarbondating of the prograding beach-ridge complex of Campo de Dalı´as (Almerı´a) allow the differentiation of six prograding units.These are called: H1, 7400–6000 cal BP; H2, 5400–4200 cal BP; H3, 4200–3000 cal BP; H4, 2700–1900 cal BP; H5, 1900–1100 cal BP; and H6, 500 cal BP–Present. H-units are deposited during periods of high relative sea level and increasedsediment input to the coast. They are bounded by large swales or erosional surfaces associated with lower sea levels andreduced input of sediment to the coast; these correspond to short periods of increased aridity inside the general arid trendrecorded in the Western Mediterranean since 5.4 ka. Changes in the flux of Atlantic superficial waters into the MediterraneanSea, and relative strength of the W/SW winds account for the recorded oscillations of relative sea level.We deduce a decadal periodicity for the deposition of a beach ridge and the adjacent swale, and suggest that it is related tofluctuations of the North Atlantic Oscillation (NAO) index and to variations of solar activity. The duration of H-units shows aquasi-millennial periodicity punctuated by short (hundred years) episodes of reduced progradation or erosion representingevents of increased aridity likely to be related to Bond’s Holocene cold events.
PB Elsevier Science B.V., Amsterdam
SN 0169-555X
YR 2003
FD 2003
LK https://hdl.handle.net/20.500.14352/56830
UL https://hdl.handle.net/20.500.14352/56830
LA eng
DS Docta Complutense
RD 29 abr 2024