TOWARDS A PLIOPLEISTOCENE CHRONOSTRATIGRAPHY IN EASTERN BETIC BASINS (SE SPAIN)

Citation
T. Bardaji et al., TOWARDS A PLIOPLEISTOCENE CHRONOSTRATIGRAPHY IN EASTERN BETIC BASINS (SE SPAIN), Geodinamica acta, 8(2), 1995, pp. 112-126
Citations number
44
Categorie Soggetti
Geosciences, Interdisciplinary",Geografhy,Geology
Journal title
ISSN journal
09853111
Volume
8
Issue
2
Year of publication
1995
Pages
112 - 126
Database
ISI
SICI code
0985-3111(1995)8:2<112:TAPCIE>2.0.ZU;2-1
Abstract
The evolution of Neogene and Quaternary littoral basins in the Eastern Betic Cordillera is largely related to tectonic activity along the Ea stern Betic sinistral shear zone. Detailed mapping of sedimentary unit s in these basins, together with sedimentological and paleomagnetic an alysis lead to the proposal of a new chronostratigraphic framework for Pliocene and Quaternary deposits. This chronostratigraphic setting re jects the synchronous character of the ''Pliocene Units'' previously r eferred to as: ''P.I'' (grey-blue marls), ''P.II'' (yellow calcarenite s), and ''P.III'' (variegated silts and clays). Instead, tectonics wou ld have controlled the paleogeographic evolution of the Eastern Betic realms, causing the lithofacies to occur repeated in space and time. T he Plio-Pleistocene boundary in these basins is not accompanied by cha nges in geodynamic behaviour or climatic conditions. According to the paleomagnetic data, these changes occurred at different times during t he Pleistocene in the different studied basins.