TY  - JOUR
AU  - Gutiérrez-Mas, José Manuel
AU  - Más Mayoral, Ramón
PY  - 2010
SN  - 2255-1379
UR  - https://hdl.handle.net/20.500.14352/44382
T2  - Revista de la Sociedad Geológica de España
LA  - eng
M2  - 23
PB  - Sociedad Geológica de España
KW  - Cadiz Gulf
KW  - Large boulders
KW  - High Energy Deposit
KW  - Pleistocene
TI  - Lithofacies and origin of a deposit of large boulders in the coast of Cadiz (SW Spain). Evidence of an event of high energy during the Pleistocene
T2  - A deposit of large boulders, interstratified in Pliocene and Pleistocene sediments has been studied in the coast of Cádiz (SW Spain). The deposit is constituted by conchiferous large boulders, medium and small size clasts and shell fragments. The facies indicate a marine origin of the deposit,and the re-worked character of the sediments and fossils, which were deposited in a high energy marine environment, previously to that they were mobilized and re-deposited by action of a highenergy directional flow.The most appropriate depositional mechanism to explain the formation of this deposit, is the action ofbig waves, generated by a great energy marine event, probably a very strong storm or a tsunami. Thetsunami action is probable since the area is located in a seismically active area, near to the limit of theAfrican and Euro-Asian plates, at the same that several earthquakes and tsunamis are historically documented in the Cadiz coast. The event should happen during the early Pleistocene, coincident with a highstand stage. The isotopic analysis by means of the Method 87Sr/86Sr carried out, hasestablished an age interval from 1.35 to 1.1 million years, corresponding to the Calabriense (Lower Pleistocene).
TY  - journal article
VL  - 23
ER  -