Constraining the Passive to Active Margin Tectonics of the Internal Central Apennines: Insights from Biostratigraphy, Structural, and Seismic Analysis

The polyphase structural evolution of a sector the internal Central Apennines, where significance pelagic deposits atop neritic carbonate platform and active margin sediments has been long debated, is here documented. results new geological survey in Volsci Range, supported by stratigraphic constraints from syn-orogenic deposits, are integrated with analysis 2D seismic reflection lines available wells adjacent Latin Valley. Late Cretaceous syn-sedimentary faults documented interpreted as steps linking to basin, located west. During Tortonian time, were squeezed off juxtaposed mélange units on top platform. Subsurface data highlighted stacked thrust sheets that first involved into an initial in-sequence propagation top-to-the-ENE, synchronous late foredeep wedge-top sedimentation. We distinguish up four groups occurred during shortening (thrusts 1–3; about 55–60 km) backthrusting (thrust 4). Pliocene recent times, area uplifted subsequently extended normal cross-cutting accretionary wedge. Beside regional interest, our findings bear implications kinematic orogenic wedge affected far-traveled units.