Abstract
ABSTRACTThe 1:10,000 geological map of the San Colombano hill covers 60 km2 in the Po Plain, south of Milan. The new and the historical surface geological data-sets are managed by a GeoDB aiming to contribute to re-interpret the Quaternary evolution at the Po Plain-Northern Apennine border. On the hill, the Calabrian shallow marine San Colombano Fm. unconformably overlies the truncated deeper-marine Miocene formations, up-thrusted by the external fronts of the Apennine Emilian Arc during Mio-Pliocene. Late Pleistocene alluvial units rest in unconformity above the marine succession both on the uplifted hilltop and on the surrounding plain. Fault-related offset of Late Pleistocene units, stratigraphic and morpho-structural evidences (facets, relic surfaces and drainage patterns), document the Quaternary tectonic history. Early to Middle Pleistocene ongoing thrust-folding at the northernmost buried reaches of the Emilian Arc was followed by Latest Pleistocene-Holocene transtension, possibly relating to the NNE striking Pavia-Casteggio lateral ramp.
Highlights
The San Colombano hill (Lombardy, Italy, Figure 1) develops above one of the buried frontal arcs of the Northern Apennine thrust belt in the Po Plain (Alfano & Mancuso, 1996; Ariati, Cotta Ramusino, & Peloso, 1988; Burrato, Ciucci, & Valensise, 2003; Desio, 1965; Pieri & Groppi, 1981)
In Figure 6(D) we summarize the constraints we obtained from surface mapping to contribute to delineate the Quaternary deformation history at the origin of the San Colombano tectonic relief and landforms
The preCalabrian unconformities described in the Po Plain subsurface (Regione Emilia-Romagna & Eni-AGIP, 1998; Regione Lombardia & Eni Divisione Agip, 2001; Intra-Zanclean and Gelasian regional unconformities, Ghielmi et al, 2013) merge in the San Colombano Hill outcrops
Summary
The San Colombano hill (Lombardy, Italy, Figure 1) develops above one of the buried frontal arcs of the Northern Apennine thrust belt in the Po Plain (Alfano & Mancuso, 1996; Ariati, Cotta Ramusino, & Peloso, 1988; Burrato, Ciucci, & Valensise, 2003; Desio, 1965; Pieri & Groppi, 1981). It represents a key-sector to understand the geological evolution at the Northern Apennine-Po Plain border. The map is implemented on a hierarchic Geo-Database comprehensive of the new and historical data
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call