Geophysical evidence of massive hyperconcentrated push waves with embedded toma hills caused by the Flims rockslide, Switzerland
نویسندگان
چکیده
Abstract. Rockslides and rock avalanches are amongst the most destructive natural hazards in alpine environment. The Flims rockslide is largest known rock-slope failure Alps, which provides excellent outcrops has fascinated researchers since early 20th century. postulated impact of on Lake Bonaduz caused intensely fluidized material, formed Formation toma hills, probably accompanied by a catastrophic wave. So far, this hypothesized sequence events based only sedimentological geomorphic analyses. We present electrical resistivity tomography (ERT) profiles, we correlated with information obtained from drill logs. Here, geophysical evidence metre decametre scale complements prior outcrop sample intervals much smaller representativeness. Our study new insights into distribution, thickness, internal structure hills as well other flood deposits around Ils Aults, where studied sediment to depth up 160 m. There that an onlap onto Aults thus stratigraphically younger unit. consist blocky cores agglomeration mixed sediments, drift override core, causing their smoothly shaped top. consider simultaneous transport within but slightly slower movement at front due bulldozing effect. This contributes improved understanding (i) complex stratigraphical context Tamins deposits, (ii) water-rich entrainment avalanches, (iii) genesis hills.
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ژورنال
عنوان ژورنال: Earth surface dynamics
سال: 2022
ISSN: ['2196-6311', '2196-632X']
DOI: https://doi.org/10.5194/esurf-10-1185-2022