Zechstein
![Zechstein Sea shown on a map of Northern Europe](/Images/godic/202502/22/Zechsteinmeer_europa3526.jpg")
Permian of Central Europe (Dyas)
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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 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.