magnesian marl

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• Magnesian Limestone — The Magnesian Limestone is a suite of rocks in north east England dating from the Permian period. The outcrop stretches from Nottingham northwards through Yorkshire and into County Durham where it is exposed along the coast between Hartlepool and …   Wikipedia

• Middridge Quarry — Coordinates: 54°37′18″N 1°37′0″W / 54.62167°N 1.616667°W / 54.62167; 1.616667 …   Wikipedia

• Crime Rigg and Sherburn Hill Quarries — Coordinates: 54°46′7″N 1°27′58″W / 54.76861°N 1.46611°W / 54.76861; 1.46611 …   Wikipedia