RT Journal Article
T1 Estructura de Ios mantos superior e inferior del Pedraforca (Pirineos orientales)
T1 Structure of the upper and lower Pedraforca thrust sheets
A1 Martinez, A.
A1 Berástegui, X.
A1 Losantos, M.
A1 Schöllhorn, Elmar
AB The Pedraforca nappe is one of the allochtonous structural units in which the Cover Upper thrust sheets of the southern Pyrenees are organised. Its is internally constituted by two thrust sheets, namely Upper Pedraforca thrust sheet and Lower Pedraforca thrust sheet. As a whole, they were emplaced in a piggyback thrusting sequence. But in the detail, a new, minor structural unit, here named "Intermediate unit", has been found in between them. This newly identified thrust sheet mainly consists of a carbonate breccia series, derived from the Lower Cretaceous sediments forming the Upper Pedraforca thrust sheet, showing an "inverted mountain" internal arrangement of elements. Restoration of a detailed cross-section allows us to interpret the Upper Pedraforca thrust sheet as the result of tectonic inversion of a Lower Cretaceous extensional basin occurred during late Cretaceous times. The sediments forming the Intermediate Unit are syntectonic materials, because they generated synchronously to the tectonic transportation of the Upper Pedraforca thrust sheet (Santonian to Maastrichtian). Further emplacement of the Intermediate unit included piggy back transportation of the Upper Pedraforca thrust sheet, until both structural units were definitively emplaced, and their frontal parts were covered by late Cretaceous to Palaeogene continental redbeds
PB Sociedad Geológica de España
YR 2001
FD 2001
LK http://hdl.handle.net/10272/18018
UL http://hdl.handle.net/10272/18018
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026