Field evidence of seismites in Quaternary deposits of the Jijel (Eastern Algeria) coastal region

Autor: Djamel Machane, El Hadi Oubaiche, Youcef Bouhadad, Azzeddine Benhamouche, A. Nedjari, N. Sidi Said
Rok vydání: 2013
Předmět:
Zdroj: Journal of Seismology. 18:289-299
ISSN: 1573-157X
1383-4649
Popis: Jijel has been hit by a strong earthquake in 1856 that triggered a destructive tsunami. Field geological investigations show that the marine terrace deposits (Tyrrhenian or likely Eutyrrhenian) exhibit several types of soft sediment deformation features including sismoslumps, thixotropic bowls, thixotropic wedges, and diapir-like structures. In addition, paleo-liquefaction features represented by neptunian and injection dikes have been observed in the sand dune deposits (Aterian or Wurm). Furthermore, typical paleo-earthquake-induced ground failures including lateral spreading, paleo-landslides, and sand volcanoes have been observed in recent, likely, Holocene deposits. Such features, remarkably comparable to present-day earthquake-induced ground failures showing clearly repetitive occurrence of past events may constitute a precious material for future paleo-seismic investigation. The various features have been interpreted herein as seismites associated to strong earthquakes produced likely by the potentially active faults previously identified in the area.
Databáze: OpenAIRE
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