Re-sedimented deposits characterize different stratigraphical intervals in the pelagic successions of the
Umbria-Marche-Sabina Domain (Central and Northern Apennines, Italy). Three stratigraphic sections of the Maiolica
and Marne a Fucoidi Formations, characterized by breccias and calcarenites embedded in pelagic sediments, were sampled
across the Mt. Primo area (Umbria- Marche Ridge, Northern Apennines). Facies analysis indicates a gravity-driven origin
for the clastic levels, interpreted as debris-flows, or turbidity flows. The massive lensoid-to-tabular levels are composed of
loose shallow-water benthic material, sourced from an unknown carbonate platform, associated with: i) lithoclasts made
of Lower Jurassic and Lower Cretaceous shallow-water carbonates; ii) Jurassic mudstones and wackestones referable to the
pelagic succession; iii) calpionellid/radiolarian-rich soft pebbles (Maiolica-type facies). The compositional features of the
studied detrital deposits imply submarine exposure and dismantling of portions of the stratigraphic succession older than
the Barremian/Aptian, which had to be buried in the late Early Cretaceous. Such evidence led us to refer the investigated
clastic event to an extensional tectonic phase. Our interpretation well fits with data coming from different geological
settings of Italy, strongly suggesting the occurrence of a widespread extensional phase in the late Early Cretaceous
