ISSN:
0016-7835
Keywords:
Key words Pyrenees
;
Cadí
;
Nogueres
;
Inversion
;
Lateral ramps
;
Transfer faults
;
Tear faults
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
Notes:
Abstract Field work in the South-Central Pyrenees suggests that omission contacts (i.e. younger over older rocks) occur at the base of the Cadí unit (Cadí thrust), and pass laterally into thrusts. This change occurs across tear faults which are present in the hangingwall of the Cadí thrust sheet and which controlled the deposition of Upper Cretaceous sediments (Adraén formation). Detailed mapping in the contact area between the Nogueres and Cadí units has shown that the actual thrust geometry in the study area is controlled by pre-existing normal and transfer faults which developed in an already compressional context. Lateral ramps or tear faults develop depending on the angle between the pre-existing extensional transfer fault and the thrust transport direction.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s005310050082
