File:Clastic dikes.JPG
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Summary[edit]
| Description |
English: 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 |
| Date | |
| Source | Own work |
| Author | Woudloper |
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I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 11:31, 16 April 2009 | | 3,072 × 2,304 (1.63 MB) | Woudloper (talk | contribs) | {{Information |Description={{en|1=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 |
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