Claerwen Fault

The Claerwen Fault is a major SW-NE trending fault in central Wales. It was active as a normal fault during deposition of Late Ordovician to mid-Silurian sedimentary rocks, downthrowing to the northwest.^[1] The estimated throw on the fault increases from about 100 m at a shallow level to about 1000 m at depth. There is no discernible change in the grade of metamorphism associated with the Caledonian Orogeny across the fault, suggesting that it was not reactivated later.^[2]

See also

• List of geological faults of Wales

References

1. ^ Woodcock, N.H.; Butler, A,J.; Davies, J.R.; Waters R.A. (1996). "Sequence stratigraphical analysis of late ordovician and early Silurian depositional systems in the Welsh Basin: a critical assessment". In Hesselbo S.E. & Parkinson D.N.. Sequence Stratigraphy in British Geology. Special Publications. 103. London: Geological Society. pp. 197-€“208. ISBN 9781897799499. http://sp.lyellcollection.org/cgi/content/abstract/103/1/197. Retrieved 17 December 2010. 
2. ^ Roberts, B.; Merriman R.J., Hirons S.R., Fletcher C.J.N. & WIlson D. (1996). "Synchronous very low-grade metamorphism, contraction and inversion in the central part of the Welsh Lower Palaeozoic Basin". Journal of the Geological Society 153 (2): 277–285. doi:10.1144/gsjgs.153.2.0277. http://jgs.lyellcollection.org/cgi/content/abstract/153/2/277. Retrieved 17 December 2010. 

Coordinates: 52°16′N 3°40′W / 52.26°N 3.66°W / 52.26; -3.66