Rock avalanches of the Ardon River valley at the southern foot of the Rocky Range,Northern Caucasus,North Osetia |
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Authors: | Email author" target="_blank">A?L?StromEmail author |
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Institution: | (1) Institute of the Geospheres Dynamics, Russian Academy of Sciences, Leninskiy Avenue 38, Building 1, 119334 Moscow, Russia |
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Abstract: | Deposits of very large rock avalanches were identified at the southern foot of the Rocky Range of the Northern Caucasus. Cliffs facing the Ardon River are 1–1.5 km high and composed of Cretaceous and upper Jurassic, hard, crystaline limestone, underlain by softer, middle Jurassic shale, siltstone and sandstone flysh. The largest rock avalanche, at Karivhoh, is ~2×109 m3 in volume, travelled more than 7 km, and covered about 18 km2 with deposits up to 200–300 m thick. All rock-avalanche bodies are composed of intensively crushed debris overlain by a blocky carapace. Numerous subsequent landslides develop within these deposits, and pose a threat to villages built on them. |
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Keywords: | Rockslide Rock avalanche Debuttressing Northern Caucasus Rocky Range Ardon River |
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