The Pennine Fault System is a NW-SE trending zone of faulting that forms the southwestern boundary to the Pennines in Cumbria. It was formed as a normal fault during Permian rifting, bounding the Vale of Eden basin, which has a half-graben geometry. It links through to the Dent Fault at its southeastern end. Rocks of Ordovician and Silurian age outcrop between the two main strands of the fault, forming the Cross Fell inlier.
References
- Hughes R.A. (2003). "Permian and Triassic rocks of the Appleby district (part of Sheet 30, England and Wales)" (PDF). Integrated Geoscience Surveys (North) Research Report RR/02/01. Natural Environment Research Council. Retrieved 19 March 2015.
- "North Pennines Area of Outstanding Beauty and European Geopark: A Geodiversity Audit" (PDF). North Pennines AONB. 2010. Archived from the original (PDF) on 2 April 2015. Retrieved 19 March 2015.