6533b7d2fe1ef96bd125f420

RESEARCH PRODUCT

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C. De SantistebanFrancisco Javier Ruiz-sánchezJ. I. Lacomba Andueza

subject

geographyTectonicsSequence (geology)geography.geographical_feature_categoryOutcropBrecciaGeochemistryGeologyStructural basinFault (geology)DebrisForeland basinGeology

description

The miocene deposits of the Quesa basin (Betic foreland) outcrops in the central part of the Valencia province (Spain). Quesa basin is a subsiding hanging-wall basin related to an ENE-WSW listric fault system. The deposits of this basin are formed by a 440 metres thick sequence of red clays, containing few intercalations of sandstones and micritic white limestones, and breccias. The upper 70 metres of this sequence is a wedge-shaped unit composed by breccias containing megablocks, wich interfinger with tabular limestones towards the central part of the basin. The breccias are foot-wall derived debris fiow deposits formed during normal faulting. A mammal site close to the base of the breccias (Quesa 2), has yielded a fossil micrommamal association of Middle to Upper Aragonian age. This allow us to consider as Middle Miocene the sediments and tectonic events in Quesa Basin.

https://doi.org/10.3989/egeol.93495-6360