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Regions \ Other \ Yorkshire



Most, if not all caves in South Yorkshire have been formed in Magnesian Limestone outcrops. This limestone tends to be highly fractured and the caves tend to be fairly short. All of the caves are relic with the possible exception of Holywell Cave which could be the only Magnesian Limestone cave to come anywhere near the current water table. The limestones in this area have created some dramatic landscape features in the area, where river and ice-age melt water action has produced a number of steep valleys and gorges as, for example, at Roche Abbey.

The caves around the North York Moors have been formed in a band of Jurassic limestone varying between 6 km and 11 km wide, which extends for almost 50 km from the Hambleton Hills in the west to Scarborough in the east. Most of the known caves are either fissure-controlled windypits or fragments of old phreatic tubes, but the area does include the active and lengthy Excalibur Pot / Bogg Hall Cave system.


North Yorkshire - Including North Yorkshire Moors but excluding Yorkshire Dales

South Yorkshire



  • Doncaster Metropolitan Borough Council Geodiversity Report.

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