Publication Date:
2021-07-14
Description:
The study deals with the morphogenetic meaning of several linear
scarps that carved the paleo-landsurface of Valle Daria, an extended
geomorphological feature located between Barisciano (AQ) and Prata
D'Ansidonia (AQ). These villages are situated in the southern termination
of the L'Aquila intermontane basin (one of the largest basin of the central
Apennines), nearby the epicentral area of the 6th April 2009 earthquake
(Mw 6.1). These scarps, up to 3 meters high and up to 1.5 km long, define
narrow/elongated flat-bottom depressions, filled by colluvial deposits.
These depressions are carved into fluvial-deltaical conglomerates, dated
back to the lower Pleistocene. Even if different authors have interpreted
these shapes as a paleodrainage or secondary faults, a morphometrical study
of the Valle Daria paleo-landsurface provided several information which
cast doubt on these two interpretations. In order to better understand the
nature and the state of activity of these lineaments, geological,
geomorphological and geophysical surveys were carried out. A
paleoseismological trench pointed out two events of deformation. The
curvilinear shape of the shear plane seems to be related to a slow
deformation, attributable to collapse-phenomena. Three GPR profiles, two
ERT profiles and two microgravimetrical profiles seem to corroborate this
interpretation. Therefore, this study permits to attribute the genesis of these
scarps to tectono-karstic phenomena, excluding the presence of an active
and capable fault.
Description:
Published
Description:
346-349
Description:
4T. Sismologia, geofisica e geologia per l'ingegneria sismica
Description:
N/A or not JCR
Keywords:
Active and capable fault
;
Quaternary geology
;
paleoseismology
;
applied geophysics
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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