Bergsturzablagerung vom Chli Rinderhorn

Darstellung und Status

Farbe CMYK
(0%,0%,0%,100%)
Rang
Hanginstabilität
Gebrauch
Element ist in Gebrauch
Status
informeller Begriff

Nomenklatur

Deutsch
Bergsturzablagerung vom Chli Rinderhorn
Français
Dépôt d'écroulement du Chli Rinderhorn
Italiano
Deposito di frana del Chli Rinderhorn
English
Chli Rinderhorn rock avalanche deposit
Historische Varianten

Bergsturz Chli Rinderhorn = Bergsturz vom Chli Rinderhorn = Chli-Rinderhorn-Bergsturz = Bergstürze des Kandertales [p.p.] (Flüeler 2011), Klein Rinderhorn rock avalanche (Grämiger et al. 2016)

Alter

Alter Top
  • Holozän
Alter Basis
  • Holozän
Datierungsmethode

9,8 +/-0,5 ka (Grämiger et al. 2016)

Referenzen

Neubearbeitung
Grämiger Lorenz M., Moore Jeffrey R., Vockenhuber Christof, Aaron Jordan, Hajdas Irka, Ivy-Ochs Susan (2016) : Two early Holocene rock avalanches in the Bernese Alps (Rinderhorn, Switzerland). Geomorphology 268, 207-221

The Klein Rinderhorn rock avalanche released ~37 million m3 of limestone along a dip-slope sliding plane, with a maximum runout distance of 4.3 km and estimated Fahrböschung angle of 14°. Deposits bulked to ~47 million m3 running up the opposing slope, with distinct hummocky morphology in the proximal area and a distal longitudinal flow ridge.

These deposits were later modified and partly obscured by ice avalanches from the nearby Altels peak. Cosmogenic 36Cl surface exposure dating revealed nearly coincident ages for both rock avalanches of 9.8 ±0.5 ka. The large lag time between local deglaciation and failure suggests that the events were not directly triggered by deglaciation. Rather, the concurrent exposure ages, also coincidingwith the nearby Kander valley rock avalanche as well as paleoseismic records from nearby lakes, strongly suggest seismic triggering.

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