Paleoseismological evidence for historical ruptures along the Meduno Thrust (eastern Southern Alps, NE Italy).

LGM glacial and glaciofluvial environments in a tectonically active area (southeastern Alps)

“…); MON: upper Tortonian-lower Messinian Montello conglomerate; PRELGM: Pliocene-Quaternary continental succession (Friuli Supersynthem); UPH: Upper Pleistocene (LGM) -Holocene p.p. alluvial and fluvioglacial deposits of the Meduna catchment; HOL: Present alluvial deposits (from Poli et al, 2021a). LGM deposits of about 20 m. This indicates a slip rate of about 0.6 mm/yr for the last 30 ka (Monegato and Poli, 2015;Fig.…”

“…In correspondence of the N280° striking oblique ramp of the Meduno thrust, the Late Pleistocene Rivalunga terrace shows a set of scarps perpendicular to the Meduno Valley. P a l a e o s e i s m o l o g i c a l trenches (Poli et al, 2021a) carried out across the scarps of the Rivalunga terrace exhibited both reverse shear planes and extrados fracturing, which deformed alluvial and colluvial units. 14 C datings of the colluvial units showed that the most recent fault movements occurred after 1360 AD and 1670 AD (Fig.…”

“…Numbers refer to stratigraphic units; E1 and E2: identified seismic events; F1 and F2: fault planes (mod. after Poli et al, 2021a). the related deposits can be easily distinguished by petrographic analysis, the Arzino is characterised by sandstones and grey carbonates (dolostones and limestones), whereas the Tagliamento contains also volcanic, low-grade metamorphic rocks and red siltstone and sandstone (Monegato and Stefani, 2011).…”

Revealing Subtle Active Tectonic Deformation: Integrating Lidar, Photogrammetry, Field Mapping, and Geophysical Surveys to Assess the Late Quaternary Activity of the Sava Fault (Southern Alps, Slovenia)

“…They are even more useful in high-relief areas with high precipitation and erosion rates, dense vegetation, and low fault slip rates, where geomorphic indicators of fault activity tend to disappear rapidly or are reshaped by non-tectonic processes [2]. Using highresolution DEMs in such an environment can help to recognize small-scaled geomorphic indicators for fault activity, enabling us to infer fault slip rates (e.g., [3][4][5][6][7]) and locate paleoseismic trenches to study past seismicity (e.g., [8][9][10][11]). In addition to investigating surface deformation, shallow subsurface investigations, including geophysical techniques with a range of tens of meters, can confirm the presence of young tectonic deformation along faults, help to precisely constrain their location, and understand the shallow geometry of the deformation structure [8,[12][13][14][15].…”