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Volume 7 (2) - 1984

FORCELLA F. & OROMBELLI G.

Holocene Slope Deformations in Valfurva, Central Alps, Italy

Pages 41-48

Abstract

Forms and structures recognized on both sides of the Valfurva Valley (Central Alps, Italy) are here described. They are indicative of Holocene slope deformations and are represented by: 1 ) discontinuous sequences and sheaves of uphill-facing scarps; 2) downhill-facing scarps; 3) open tension cracks, furrows and trenches. Uphill-facing scarps with walls up to 10 m high prevail on the northern side of the valley, while downhillfacing scarps and trenches are more common on the southern side. On both sides the above mentioned structures cut moraines and rock glaciers of Late-glacial age, while in other cases they are covered by similar deposits. These forms are commonly related to gravitational spreading of ridges and/or deep seated rock creep. Nevertheless in this case the relatively uniform attitude of the shear surfaces, dipping northeastwards, independently from the aspect and inclination of the slope, suggest that such discontinuities are the superficial expression of neotectonic deformations, which fit into the framework of the present neotectonic activity in Central Alps.

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