"The Zechstein (German either from mine stone or tough stone) is a unit of sedimentary rock layers of Middle to Late Permian (Guadalupian to Lopingian) age ...
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located in the European Permian Basin which stretches from the east coast of England to northern Poland. The name Zechstein was formerly also used as a unit of time in the geologic timescale, but nowadays it is only used for the corresponding sedimentary deposits in Europe.
The Zechstein lies on top of the Rotliegend; on top of the Zechstein is the Buntsandstein or Bunter." - (en.wikipedia.org 16.07.2022)
