| Autor: |
I. Martin Rojas, R. S.o.m.m.a. F. Delgado, A. Estevez, V. Zamparelli, IANNACE, ALESSANDRO |
| Přispěvatelé: |
I., Martin Roja, Delgado, R. S. o. m. m. a. F., A., Estevez, Iannace, Alessandro, V., Zamparelli |
| Jazyk: |
angličtina |
| Rok vydání: |
2012 |
| Předmět: |
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| Popis: |
E litho-biostratigraphic analysis has been car- ried out in the Gador-Turon unit of the Sierra de Gador (Alpujarride complex, Betic Cordillera, SE Spain). The Triassic succession of this unit is composed of a lower meta-detrital formation overlain by an upper meta-car- bonate formation divided in six members. In the latter, a Ladinian–Carnian-rich fossil association has been found (foraminifers, algae, bivalves, microproblematica, trace fossils). Facies analysis has enabled the recognition of 22 facies of platform origin. This succession accumulated as a subsiding margin-type carbonate platform with homoclinal ramp geometry (Anisian?–Ladinian) evolving into a fault- block-type platform with a steeper-margined geometry (Ladinian–Carnian). Slope deposits of this latter platform show a prism-like geometry with progradational patterns and include syn-sedimentary structures associated with normal faults capped by younger beds. The results of the present research indicate that the architecture of the plat- form studied has been controlled mainly by climate and oceanic factors during the development of the ramp, and by syn-sedimentary extensional tectonics during the develop- ment of the steeper-margined platform. The Ladinian– Carnian tectonic activity was probably also responsible for the siliciclastic input and the shift to a mixed terrigenous- carbonate platform. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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