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DOI 10.4461/GFDQ.2018.41.16

BOLLATI I.M., CERRATO R., CROSA LENZ B., VEZZOLA L., GIACCONE E., VIANI C., ZANONER T., AZZONI R.S., MASSEROLI A., PELLEGRINI M., SCAPOZZA C., ZERBONI A. & GUGLIELMIN M.,

Geomorphological map of the Val Viola Pass (Italy-Switzerland)

Pages 105-114

Abstract

The Val Viola Pass is a transboundary area between Italy (Val Viola Bormina) and Switzerland (Val da Camp), whose evolution has been triggered, since the Last Glacial Maximum (LGM), by intense reactivation of surface processes. Geomorphological mapping at a scale of 1:5000 provided an understanding of the deglaciation dynamics affecting this region. The geomorphological map (herein presented at scale 1:7000) extends for 5.35 km2 between the elevations of 2305 and 3302 metres above sea level (m a.s.l.). The geomorphological map suggests that the area undergoes geomorphic processes typical of alpine environments of middle latitude, and had experienced a paraglacial-type re-equilibrium related to post-LGM land evolution, with predominant slope and periglacial processes. Moreover, current water action is evident at low elevations. Most of landforms are affected by major regional structures oriented NE-SW. On the Swiss side, specific investigations of the Paradisin rock glacier were performed by Electrical Resistivity Tomography-ERT to determine its internal structure. This was in order to understand its possible cryotic conditions, despite its relict appearance derived from its surface aspect.

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