[Back]

C. Zangerl, C. Prager, W. Chwatal, E. Brückl, H. Kirschner, R Brandner:
"Kinematics and internal deformation of a slow deep-seated rock slide in metamorphic rock (Niedergallmigg, Austria)";
in: "Landslides and Engineered Slopes. Protecting Society through Improved Understanding.", issued by: Erik Eberhardt, Corey Froese, Keith Turner, S. Leroueil; CRC Press, 2012, ISBN: 978-0-415-62123-6, 653 - 658.

The slowly "creeping" deep-seated rock slide Niedergallmigg (Tyrol, Austria) comprises a volume
of more than 400 million m3 and a maximum thickness of more than 300 m. Results from geodetic surveys
i.e. terrestrial and GPS methods show actual slope velocities ranging from 3 to 8 cm per year. The rock
slide Niedergallmigg is located in phyllitic rock of the Landecker Quarzphyllite Zone and paragneissic rock
as well as mica schists of the Silvretta Crystalline Complex. Post-glacially, the sliding mass moved more than
200 m which in turn caused considerable internal rock mass deformation i.e. fracturing, fragmentation and dilatation.
In relation to the pre-failure topography the middle to upper part of the rock slide gained volume loss
and at the toe the slope volume increased. GIS-based estimations show an enormous volume imbalance between
the volume loss and accumulation areas. Given that the volume increase at the toe is nearly three times
smaller than the volume loss at higher elevations considerable slope toe erosion by the river Inn has occurred
post-glacially.

http://publik.tuwien.ac.at/files/PubDat_213444.pdf