Bergsturzablagerung vom Chli Rinderhorn
Représentation et statut
- Couleur CMYK
- (0%,0%,0%,100%)
- Rang
- instabilité de terrain
- Usage
- Ce terme est en usage.
- Status
- terme informel
Nomenclature
- 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
- Origine du nom
- Variantes historiques
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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)
Âge
- Âge au sommet
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- Holocène
- Âge à la base
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- Holocène
- Méthode de datation
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9,8 +/-0,5 ka (Grämiger et al. 2016)
Références
- Révision
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(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.