Morphostructural evidence of Late Quaternary tectonics at the Po Plain-Northern Apennines border (Lombardy, Italy)

Abstract Understanding the recent events marking the late Quaternary history of the Po Plain (N-Italy) is of overriding importance to decipher the record of depositional versus erosional phases, and their interplay with climatic, tectonic, and human forcing. We reconstructed the structural setting and chronostratigraphy of a Holocene succession crosscut by a thrust fault located south of Montodine (Cremona, Italy) within the Po Plain. The fault shows a maximum displacement up to one meter. Radiocarbon dating fixes a minimum age of 11.9 cal ka BP for the postglacial river entrenchment and constrains the fault movement age between 5.9 and 3.4 cal ka BP. Undeformed Late Medieval coarse gravels cover the faulted succession. Due to the outcrop position, lying above the buried frontal thrusts of the Southern Alps and North Apennines, we propose that faulting results from secondary surface effects induced by seismic shaking. We discuss two main mechanisms, both related to lateral spreading, that can result in the formation of reverse faults close to the surface. The Soncino area, recording one of the strongest historical earthquakes of the central Po Plain (1802), is considered as a possible source for seismic shaking. The results of this study are a contribution for the assessment of the potential seismic hazard in one of the most populated regions of Europe.

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Quantitative Bathymetric Models and Their Applications for Late Quaternary Transgressive-Regressive Cycles of the Po Plain, Italy

The Paleontological Society Special Publications ◽

10.1017/s2475262200013551 ◽

2014 ◽

Vol 13 ◽

pp. 166-167

Author(s):

Jacalyn M. Wittmer ◽

Troy A. Dexter ◽

Daniele Scarponi ◽

Michal Kowalewski ◽

Alessandro Amorosi

Keyword(s):

Late Quaternary ◽

Po Plain

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Late Quaternary uplift and valley evolution in the Northern Apennines: Lamone catchment

Quaternary International ◽

10.1016/s1040-6182(02)00106-4 ◽

2003 ◽

Vol 101-102 ◽

pp. 253-267 ◽

Cited By ~ 14

Author(s):

Alessandro Simoni ◽

Carlo Elmi ◽

Vincenzo Picotti

Keyword(s):

Late Quaternary ◽

Northern Apennines

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New insight on the sedimentary record related to the late-Quaternary tectonics of the western segment of the “Livorno-Sillaro” (Northern Tuscany, Italy).

10.5194/egusphere-egu2020-19557 ◽

2020 ◽

Author(s):

Giovanni Sarti ◽

Vito Gerardo Giannico ◽

Daniele Pittaro ◽

Lorenzo Porta

Keyword(s):

Response Times ◽

Late Quaternary ◽

River System ◽

Northern Apennines ◽

Tectonic Activity ◽

Middle Pleistocene ◽

Stratigraphic Sequence ◽

Multidisciplinary Analysis ◽

Facies Associations ◽

Relief Distribution

The &#8220;Livorno-Sillaro&#8221; line represents one of the most important transversal structure of the inner Northern Apennines.&#160;&#160;It has been described in the literature as a major strike-slip fault (e.g., Bortolotti, 1966; Carmignani et al., 1994; Pascucci, 2005; Pascucci et al., 2007), and it is divided into two segments, eastern and western.&#160;A stratigraphic-sequence frame for the late-Quaternary deposits has been developed by using the different facies associations defined through a large subsurface database analysis. Moreover, a correlation has been done between subsoil deposits and the outcropping sediments on the hilly areas (Livorno, Pisa and Cerbaie hills) surrounding the Arno valley.Additionally, a morphotectonic analysis of the hydrographic networks and relief distribution has been done the Lidar data (DTM), supplied by the Tuscany Region, at the 2 m and 10 m of resolution. Specifically, the river system is particularly sensitive to deformation processes. The fluvial streams are in fact characterized by low geomorphological inertia and, therefore, by response times of a few hundred thousand years to the tectonic processes in progress.As a result of the integrated multidisciplinary analysis, it was possible to highlight a tectonic activity in the middle Pleistocene -Holocene interval of the western portion of the "Livorno-Sillaro" lineament neglected in the geological literature until now.ReferencesBortolotti V. (1966) &#8211; La tettonica trasversale dell&#8217;Appennino &#8211; La linea Livorno-Sillaro. Bollettino della Societ&#224; Geologica Italiana, Vol.85, pp. 529-540, 3 ff., 1 tav.Carmignani L., Decandia F.A., Fantozzi P.L., Lazzarotto A., Liotta D. & Meccheri M. (1994) &#8211; Tertiary extensional tectonics in Tuscany (Northern Apennines, Italy).&#160;Tectonophysics. Vol. 238, pp. 295-315.Pascucci V. (2005) &#8211; Neogene evolution of the Viareggio Basin, Northern Tuscany (Italy). GeoActa. Vol. 4, pp. 123-128.Pascucci V., Martini I.P., Sagri M. & Sandrelli F. (2007) &#8211; Effects of transverse structural lineaments on the Neogene-Quaternary basins of Tuscany (inner Northern Apennines, Italy). Sedimentary Processes, Environments, and Basins: A Tribute to Peter Friend.&#160;

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