Further north, the Zechstein salt becomes diapiric, forming salt domes which form the structure for several oil fields, such as Machar. Zechstein dolomites crop out near the coast of County Durham, England where they are known as the Magnesian Limestone.
In northern regions, the Zechstein salt forms diapirs, creating salt domes that support numerous oil fields, including Machar.  Zechstein dolomites can be seen in County Durham, England, and are referred to as the Magnesian Limestone.