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| View Original: | Clastic dikes.JPG (3072x2304) | |||
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| Keywords: Clastic dikes.JPG en Clastic dykes in recent late Pleistocene sedimentary strata Left an extensional crack formed in permafrost soil filled with gravel Right a sand dyke an escape structure formed by liquefaction of sand underneath a clay layer The sand bursts through the clay hydrofracture to form a clastic dyke The stress was due to an overlying advancing glacier during the last glacial maximum LGM about 25 000 years ago The dykes are cut off by an erosional unconformity covered by the basal till of the glacier Location quarry at Finsterhennen Switzerland own Woudloper 2007-09 Soft sediment deformation Sedimentary rocks Finsterhennen Geology of Switzerland Clastic dikes in Switzerland Rocks in Switzerland | ||||
