The Agri Valley is a NW-SE oriented intermontane basin located in the axial zone of the Southern Apennines mountain belt, filled by Quaternary continental deposits. Faults responsible for the basin formation, mainly oriented according to N120°10° and N50°-55° trends, dissected the Southern Apennines fold and thrust belt and determined the sedimentary evolution of the basin during Pleistocene. The basin consists of three tectonically controlled and diachronous depocenters, bounded by WNW-ESE and NE-SW faults; outcrops occur in the south-eastern one, which was deeply dissected by the drainage network during the Late Pleistocene-Holocene. In this area, four allostratigraphic units represented by lacuo-palustrine and fan-delta, axial braid-plain and alluvial fan deposits accumulated in response to changes in intrabasinal subsidence, catchment relief, regional tectonics and climate. These units form the Agri Valley Allogroup, up to 100 m thick. Their erosional boundaries can be associated with preserved weathering profiles and/or paleosols. The latter developed at the top of alluvial fans (fed from both the northern and southern sides of the basin) and on the NW-SE axial alluvial plain, during geomorphological stability stages. Physical stratigraphy, facies associations, architectural elements and geopedological characterization (mainly micromorphological) are the key to decipher the sedimentary evolution of the basin and the contemporaneous palaeogeographic and climatic changes. This information, in combination with OSL, 14C, AFTA dating methods, provide insights into the tectono-sedimentary evolution of the area during the Pleistocene.
|Titolo:||STRATIGRAPHIC ARCHITECTURE AND QUATERNARY EVOLUTION OF THE AGRI INTERMONTANE BASIN (SOUTHERN APENNINES, ITALY)|
ZEMBO, IRENE (Primo)
|Data di pubblicazione:||set-2007|
|Tipologia:||Book Part (author)|
|Appare nelle tipologie:||03 - Contributo in volume|