Late Tertiary tectonic history of the Táchira Depression, southwestern Venezuelan Andes
1984; Geological Society of America; Linguagem: Inglês
10.1130/mem162-p333
ISSN0072-1069
Autores Tópico(s)Geological and Tectonic Studies in Latin America
ResumoNew field observations in the Táchira Depression indicate the presence of conspicuous thrust faults that were previously mapped as normal faults. This new information, combined with the sedimentological study of a Miocene-Pliocene fluvial sequence (La Copé Formation), indicates a succession of late Cenozoic tectonic events in the area. During late Oligocene and up to middle(?) Pliocene time, regional compressive stress oriented at 120° produced two sets of superimposed folds and caused thrust faulting toward the northwest. During the middle(?) to late Pliocene, compressive stresses changed to 040°, producing low-angle thrust faulting toward the northeast. This latter stress direction was the...
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