Complex fault assemblages associated to liquefaction structures have been analyzed in a Pliocene basin located along the Gulf of California. The studied outcrop shows a fossil fault plane formed in soft flat lying sediments. The liquefaction and fluidification structures have been recognized in volcaniclastic layers deposited in a lagoonal environment and are potentially related to seismic wave shaking and to successive dewatering along fractures. This stratigraphic record is explained by the progressive development of a seismic fault zone, related to the transtensional regime still active in the Gulf. The present analysis can be considered as an useful case study for the reconnaissance of the different types of structures formed during synsedimentary deformation in hydroplastic conditions. -Author
Zanchi, A. (1992). Tectonic and liquefaction structures in the Loreto Basin, Baja California (Mexico): synsedimentary deformation along a fossil fault plane. GEODINAMICA ACTA, 5(3), 187-201 [10.1080/09853111.1992.11105227].
Tectonic and liquefaction structures in the Loreto Basin, Baja California (Mexico): synsedimentary deformation along a fossil fault plane
ZANCHI, ANDREA MARCOPrimo
1992
Abstract
Complex fault assemblages associated to liquefaction structures have been analyzed in a Pliocene basin located along the Gulf of California. The studied outcrop shows a fossil fault plane formed in soft flat lying sediments. The liquefaction and fluidification structures have been recognized in volcaniclastic layers deposited in a lagoonal environment and are potentially related to seismic wave shaking and to successive dewatering along fractures. This stratigraphic record is explained by the progressive development of a seismic fault zone, related to the transtensional regime still active in the Gulf. The present analysis can be considered as an useful case study for the reconnaissance of the different types of structures formed during synsedimentary deformation in hydroplastic conditions. -AuthorI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.