Prismatic disjunction - Porto Santo Island, Portugal
This photo it was taken during a field trip correlated with the Porto Santo bentonites. A prismatic disjunction (or disjunction columnar or columnar gasket) is a type of geological event which happens during the cooling of the wash process.
Taken on 7
Submitted on 22 February 2016
Credit: Cristiana Costa (distributed via imaggeo.egu.eu)
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