Kokelaar, P. (1992). "Ordovician marine volcanic and sedimentary record of rifting and volcanotectonism: Snowdon, Wales, United Kingdom". Geological Society of America Bulletin. 104 (11): 1433–1455. doi:10.1130/0016-7606(1992)104<1433:OMVASR>2.3.CO;2.
Wilkinson, I.; Smith, M. (1988). "Basement fractures in North Wales: their recognition and control on Caledonian deformation". Geological Magazine. 125 (3): 301–306. doi:10.1017/S0016756800010244.
Woodcock, Nigel H. (1990). "Transpressive Acadian deformation across the Central Wales lineament". Journal of Structural Geology. 12 (3): 329–337. doi:10.1016/0191-8141(90)90017-S.
