Stratigraphic and structural features of the Sibillini Mountains (Umbria-Marche Apennines, Italy)

Abstract

In this paper we illustrate the stratigraphic and structural features of the Sibillini Mountains on the basis of a 1:40.000 geological map. Following the “Foglio 132 Norcia” (Geological Map of Italy at 1:100.000 scale; SCARSELLA, 1941), this new geological map is the first cartographic document that covers the whole area of the Sibillini Mts. This area is key for understanding the geological evolution of the external zones of the Apennine orogen, mostly owing to the pronounced structural elevation of the Apennine ridge at the Sibillini Mts. area. This allowed us to: a) carry out stratigraphic and structural analyses for the Umbria-Marche sedimentary cover to the oldest units; b) analyze the paleo-tectonic setting of this sector of the Afro-Adriatic continental margin and the behavior of pre-existing structures during the subsequent deformation events; c) investigate in depth the major Apennine thrust front (“Sibillini Mountains Thrust”) exposed in several sites (Fiastrone, Ambro, Tenna and Tronto valley) and its relationship with the units of the adjacent Messinian foredeep

Ground deformation and fault modeling of the 2016 sequence (24 Aug. – 30 Oct.) in central Apennines (Central Italy)

“…As a characteristic faulting style in this region, Valensise et al (2016) suggest that upward propagation of fault rupture is restricted due to the occurrence of pre-existing regional thrusts or other inherited structural features which act as barriers and/or deflectors. The proposed, by various institutes (INGV, GFZ, GCMT, USGS and IPGP), fault plane solutions (Table 1) of the five strongest events of the 2016 sequence follow the above geodynamic pattern and agree with the NNW-SSE-trending normal fault pattern in the broader area as suggested in previous studies Centamore et al, 1992;Blumetti et al, 1993;Boncio & Lavecchia, 2000;Galadini & Galli, 2000;Galadini et al, 2003;Pizzi et al, 2002;Borre et al, 2003;Boncio et al, 2004;Galli et al, 2005;Pace et al, 2006;Pizzi & Galadini, 2009;Pauselli et al, 2010;Pierantoni et al, 2013and geodatabases like DISS, 2015and ITHACA, 2000.…”

“…To achieve this target, we modelled and evaluated the responsible fault segments of these events. from , ITHACA (2000), Tondi & Cello (2003), Roberts & Michetti (2004), Pierantoni et al (2013). …”

A Multi-Model Approach Using Statistical Index and Information Criteria to Evaluate the Adequacy of the Model Geometry in a Fissured Carbonate Aquifer (Italy)

“…The outcropping geological formations are mainly composed of calcareous, marly and siliciclastic lithotypes (from Trias to Miocene in age) that belong to the Umbria-Marche Succession [41,42]. From bottom to top, the following formations can be observed ( Figure 2 The outcropping geological formations are mainly composed of calcareous, marly and siliciclastic lithotypes (from Trias to Miocene in age) that belong to the Umbria-Marche Succession [41,42].…”

Pliocene –Pleistocene geomorphological evolution of the Adriatic side of Central Italy

“…1); a short description of the stratigraphic type sequence, mainly based on the stratigraphic schemes worked out by M. Chiocchini, P. Didaskalou, A. Micarelli and M. Potetti as part of the projects aimed at compiling the Geological Map of the Marche Region Regione Marche 2001;Pierantoni et al 2013) will be given next.…”

“…This "schematic" structural setting is complicated by the presence of several east-verging thrusts which caused the overlapping of various levels of the sedimentary succession and the resulting genesis of the Umbria-Marche Apennine (Calamita & Deiana 1988;Mazzoli et al 2005;Pierantoni et al 2013). The genesis is associated with the intense Oligocene-Miocene compressive tectonics (active until the Pliocene), in the outermost sector (Bally et al 1986;Deiana & Pialli 1994;Calamita et al 2012;Di Domenica et al 2012) and to wide-ranging vertical movements, not related to the structural setting of bedrock (Dufaure et al 1989;Dramis 1992).…”