2024-03-29T10:43:16Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/315392011-01-25T23:00:00Zcom_10261_91com_10261_8col_10261_344
Alfaro, P.
Gibert, Luis
Moretti, Massimo
García-Tortosa, Francisco Juan
Sanz de Galdeano, Carlos
Galindo Zaldívar, Jesús
López-Garrido, A. C.
2011-01-26T09:48:28Z
2011-01-26T09:48:28Z
2010-06
Terra Nova 22(3): 172-179 (2010)
0954-4879
http://hdl.handle.net/10261/31539
10.1111/j.1365-3121.2010.00930.x
Giant load-type seismites, uncommon in the geological record, are described in Plio-Pleistocene lacustrine deposits of the Baza Basin (Betic Cordillera, S Iberia). Deformed beds of the marginal lacustrine and distal alluvial facies of the Baza palaeo-lake can be traced continuously for several kilometres. Soft-sediment deformation is represented by load-type structures of large dimensions (pillows around 4 m in width and 2 m in height). Three-dimensional exposures show ellipsoidal pillows separated by fluidized channels without any preferred orientation. The final size of these load-type seismites is strongly influenced by sedimentary factors such as the presence of a reverse density gradient in sediments and the bed thickness. The giant seismites of the Baza basin are located in a region, which is unlikely to have been subjected to high magnitude earthquakes (maximum around 7.0). Therefore, magnitude is not the main factor that controls the size of these load-type structures.
eng
closedAccess
The significance of giant seismites in the Plio-Pleistocene Baza palaeo-lake (S Spain)
artículo