A minor normal fault in the siltstones and mudstones of unit P18. Normal faults develop in tensional environments. Under such conditions, the more competent units in sequences often undergo localized thinning or pinching. Note the change in thickness of the prominent, grey, siltstone unit in the vicinity of the fault.
Scale: diameter of coin is 25 mm.
Grid reference: 976 282
This page is maintained by Roger Suthren
Last Modified: 18 November, 2008