From Wikipedia, the free encyclopedia
This is a list of the named geological faults affecting the rocks of Wales . See the main article on faults for a fuller treatment of fault types and nomenclature but in brief, the main types are normal faults, reverse faults, thrusts or thrust faults and strike-slip faults. Many faults may have acted as both normal faults at one time and as reverse or thrust faults at another and may or may not have also incorporated some degree of strike-slip movement too. Fault zones, fault belts and fault complexes typically describe assemblages of faults which have a common origin and history and whose alignments tend to be sub-parallel to one another.
There are also a number of 'disturbances' , notably in South Wales . These linear features are a combination of faults and folds - the relative importance of faulting and folding varying along the length of each disturbance.
Key to tables
Column 1 indicates the name of the fault. Note that different authors may use different names for the same fault or a section of it. Coversely the same name may be applied to more than one fault, particularly in the case of smaller faults which are widely separated. Names are as they appear in the literature and do not necessarily conform to the commonly accepted modern spelling or form of the place-names with which they are associated.
Column 2 indicates the OS grid reference of the approximate midpoint of certain faults. Note that the mapped extent of a fault may not accurately reflect its actual extent.
Column 3 indicates the county in which the fault occurs. Some traverse two or more counties of course.
Column 4 indicates on which sheet, if any, of the British Geological Survey 's 1:50,000 / 1" scale geological map series of England and Wales, the fault is shown and named (either on map/s or cross-section/s or both). Also listed are a handful of BGS maps at other scales, where the fault is both shown and named.
Column 5 indicates a selection of publications in which references to the fault may be found. See references section for full details of publication.
Alphabetical lists of faults
A
Fault name
OS map ref
County
BGS map sheet
book reference/s
Aber Dinlle Fault
Gwynedd
Brenchley & Rawson 2006
Aber Fault
Glamorganshire
E&W 248
Aber Richard Fault
E&W 194; 210
Aberdaron Fault
Gwynedd
E&W 133
Abergwesyn Fault
E&W 196, 212
Abertridwr Fault
Glamorganshire
E&W 249
Acorn Fault
E&W 230
Afon Banwy Fault
Powys
E&W 150
Afon Ganol Fault
Clwyd
Mem E&W 95/107
Afon Saint Fault
Gwynedd
E&W 133
Allt y Crib Fault
E&W 163
Allt y Grug Fault
E&W 230
Alyn Valley Fault
E&W 108
Anafon Fault
Gwynedd
E&W 106
Arthog - Caerdeon Fault
E&W 149
Axton Fault
Flintshire
E&W 96
B
Fault name
OS map ref
County
BGS map sheet
book reference/s
Bala - Llanelidan Fault
Smith et al. 2005
Bala Fault
E&W 135; 136
Bala Fault Zone
UK (south) 625K
Beddgelert Fault
Gwynedd
E&W 119
Beech Hill Fault
Monmouthshire
Usk-Cwm:25K
Belmont Fault
Clwyd
Mem E&W 95/107
Benton Fault
Pembrokeshire
E&W 228
Brenchley & Rawson 2006
Berach Fault
E&W 230
Berw Fault
Anglesey
Brenchley & Rawson 2006
Berw Fault Complex
Anglesey
Brenchley & Rawson 2006
Bethel Fault
Glamorganshire
E&W 247
Bettws Fault
E&W 230
Blaenavon Fault
Monmouthshire
E&W 232
Blaenhirwaun Thrust
E&W 230
Bodafon Thrust
Anglesey
Brenchley & Rawson 2006
Bodelwyddan Fault
Denbighshire
E&W 95; 107
Mem E&W 95/107
Box Fault
Glamorganshire
E&W 247
Bristol Channel Fault Zone
Bristol Channel
Bronnant Fault
E&W 210; 211
Bronnant Fault Zone
E&W 195
Brothers Fault
Glamorganshire
E&W 247
Brwynd Overthrust
E&W 163
Bryn Eglwys Fault
E&W 120
Brenchley & Rawson 2006
Bryn Morgan Thrust
E&W 230
Bryn Posteg Fault
E&W 164
Bryn Rhys Fault
Clwyd
Mem E&W 95/107
Brynderi Fault
Monmouthshire
Mem E&W 233/250
Bryneglwys Fault
E&W 121
Bryngwili Fault
E&W 230
Bryngwyn Fault
Glamorganshire
E&W 230; 247
Bryn-y-maen Fault
Denbighshire
E&W 95
Bwlchgwyn Fault
E&W 108
Bylchau Fault
Denbighshire
E&W 107
Mem E&W 95/107
C
Fault name
OS map ref
County
BGS map sheet
book reference/s
Cae Parc Fault
Glamorganshire
E&W 247
Caerdeon Bodlyn Fault
Merionethshire
E&W 135
Caergwrle Fault
E&W 108
Caerleon Fault
Monmouthshire
E&W 249; Usk-Cwm:25K
Caerphilly Fault
Glamorganshire
E&W 249
Camdwr Fault
E&W 163
Capel Garmon Fault
Clwyd
E&W 107
Mem E&W 95/107
Cardigan - Fishguard Fault Belt
Pembrokeshire
E&W 210
Carmel Fault (Powys)
Powys
E&W 179
Carmel Fault (Carmarthenshire)
Carmarthenshire
E&W 230
Carmel Head Thrust
UK (south) 625K
Brenchley & Rawson 2006
Carrog Valley Fault
Ceredigion
E&W 178
Cascade Overthrust
E&W 163
Castell Fault
E&W 163
Cefn Fault
Clwyd
Mem E&W 95/107
Cefn Bryn Thrust
Glamorganshire
E&W 246
Cefn Crib Fault
Glamorganshire
E&W 249
Cefn Fault
E&W 107
Cefn Garw Fault
Monmouthshire
Mem E&W 233/250
Cefn Ila Fault
Monmouthshire
Usk-Cwm:25K
Cefnamwlch-Rhiw Fault
Gwynedd
E&W 134
Ceibwr Bay Fault
E&W 193
Ceidio Fault
Anglesey
Brenchley & Rawson 2006
Ceunant Fault
E&W 149
Chapel Fault
E&W 231
Chepstow Fault
Monmouthshire
Mem E&W 233/250
Church Stretton Fault System
Brenchley & Rawson 2006
Church Stretton Fault Zone
E&W 213
Cilfeigan Fault
Monmouthshire
E&W 249; Usk-Cwm:25K
Claerwen Fault
E&W 179
Clochaenog Fault
Clwyd
Mem E&W 95/107
Clwyd Fault
Smith et al. 2005
Clydach Bridge Fault
Monmouthshire
E&W 232
Clywedog Fault
E&W 164
Coalbrook Fault
E&W 230
Coed Hir Fault
E&W 231
Coed Ithel Fault
Monmouthshire
Mem E&W 233/250
Coed-y-paen Fault
Monmouthshire
E&W 249; Usk-Cwm:25K
Conwy Valley Fault /Conway Valley Fault
Gwynedd
E&W 106
Mem E&W 95/107
Copper Works Fault
Glamorganshire
E&W 247
Cors-bol Fault
Anglesey
Brenchley & Rawson 2006
Craig Twrch Fault
E&W 212
Craiglaseithin Fault
Gwynedd
E&W 135/149
Craignant - Milton Fault
Smith et al. 2005
Craignant Fault
Smith et al. 2005
Craig-y-beri Fault
E&W 137
Craig-y-glyn Fault
E&W 137
Creigydd Fault
Monmouthshire
E&W 249; Usk-Cwm:25K
Cribarth Fault
E&W 213
Crick Fault
Monmouthshire
Mem E&W 233/250
Cross Ash Fault
Monmouthshire
Mem E&W 233/250
Crychan Fault
Powys
E&W 196, 213
Crychan Fault Belt
E&W 213
Cwm Cayo Brook Fault
Monmouthshire
Mem E&W 233/250
Cwm Cynnen Fault
E&W 211
Cwm Dockin Fault
E&W 165
Cwm Dwfnant Fault
E&W 196
Cwm Earl Fault
E&W 165
Cwm Felin Fault
Glamorganshire
E&W 247
Cwm Llwyd Fault
E&W 230
Cwm Pennant Fault
Brenchley & Rawson 2006
Cwm Pit Fault
Glamorganshire
E&W 247
Cwm Sylwi Fault
E&W 149; 163
Cwmcarvan Fault
Monmouthshire
Mem E&W 233/250
Cwm-dows Fault
Glamorganshire
E&W 249
Cwmgwineu Fault
Glamorganshire
E&W 247
Cwmllynfell Fault
E&W 230
Cwm-Mawr Fault
E&W 196
Cwmmawr Thrust
E&W 230
Cwmneol Faul
E&W 231
Cymmer Fault
Glamorganshire
E&W 248
Cynheidre Thrust
E&W 230
Cynllaith Fault
E&W 137
D
Fault name
OS map ref
County
BGS map sheet
book reference/s
Daren Ddu Fault
Glamorganshire
E&W 249
Daron Fault
Gwynedd
E&W 133
Denbigh Fault
Clwyd
E&W 107
Mem E&W 95/107
Dinas Fault (Powys)
Powys
E&W 231
Dinas Fault (Glams)
Glamorganshire
E&W 248
Dinorwic Fault
Gwynedd
E&W 106
Dip Fach Fault
E&W 231
Dolforwyn Fault
E&W 165
Dolwar Fault
Powys
E&W 150
Dowlais Fault (Mons)
Monmouthshire
E&W 231; 232
Dowlais Fault (Glams)
Glamorganshire
E&W 249
Duffryn Fault
Glamorganshire
E&W 230, 247
Dulas Fault
E&W 196
Dulas Gap Fault
Denbighshire
E&W 95; 107
Mem E&W 95/107
Dyffryn Maelor Fault
Clwyd
Mem E&W 95/107
Dyfi Valley Fault
Powys
E&W 150
Dyfnant Fault
Powys
E&W 150
Dyfngwm Fault
E&W 164
Dylife Esgairgaled Fault
E&W 164
Dylife Fault
E&W 164
Dynant Fault
E&W 230
Dysynni Fault
E&W 149
Dyto Fault
Clwyd
Mem E&W 95/107
E
Fault name
OS map ref
County
BGS map sheet
book reference/s
East Llangerniew Fault
Clwyd
E&W 107
Mem E&W 95/107
Efailnewydd Fault
Gwynedd
E&W 134
Eglwysbach Fault
Clwyd
Mem E&W 95/107
Energlyn Fault
Glamorganshire
E&W 249
Erroxhill Fault
Pembrokeshire
E&W 228
F
Fault name
OS map ref
County
BGS map sheet
book reference/s
Felin Arw Fault
Glamorganshire
E&W 248
Ferry Fault
Glamorganshire
E&W 247
Flint Fault
E&W 108
Forge Overthrust
E&W 149; 163
G
Fault name
OS map ref
County
BGS map sheet
book reference/s
Gadlys Fault
Glamorganshire
E&W 231; 248
Gardeners Fault
Glamorganshire
E&W 230; 247
Garth - Llanwrtyd Fault Belt
E&W 212
Garth Fault
E&W 196, 213
Garth Ferry Fault
Anglesey
Brenchley & Rawson 2006
Garth Hill Overthrust
Glamorganshire
E&W 249
Gelli Fault
Glamorganshire
E&W 249
Gelligaer Fault
Glamorganshire
E&W 249
Gelli-goch Overthrust
E&W 149; 163
Giant's Grave Fault
Glamorganshire
E&W 247
Glan Hafren Fault
E&W 165
Glanalders Fault
E&W 179
Glandyfi Fault
E&W 163
Glaslyn Valley Fault
Brenchley & Rawson 2006
Glyn Ceiriog Fault
E&W 121
Glyn Fault
Monmouthshire
E&W 249; Usk-Cwm:25K
Glyn Valley Fault
E&W 135
Glyn Wallis Fault
E&W 230
Glyncorrwg Fault
Glamorganshire
E&W 231; 248
Gnoll Fault
Glamorganshire
E&W 247
Gop Fault
Flintshire
E&W 95
Mem E&W 95/107
Gors Fault
Glamorganshire
E&W 230, 247
Gorsedd Bran Fault
Clwyd
Mem E&W 95/107
Gorseinon Fault
Glamorganshire
E&W 247
Great Ewloe Fault
E&W 108
Greenland Fault
Monmouthshire
E&W 232
Gresford Fault
E&W 121
Grib Fault
E&W 230
Groes Fault
Clwyd
E&W 107
Mem E&W 95/107
Grovesend Fault
Glamorganshire
E&W 230; 247
Guilsfield Fault
Powys
E&W 150, 151
Gwaynynog Fault
Clwyd
E&W 107
Mem E&W 95/107
Gwern-ddu Fault
Monmouthshire
Mem E&W 233/250
Gwespyr Fault
Flintshire
E&W 96
Gwili Fault
Glamorganshire
E&W 230, 247
Gwrych Castle Fault
Denbighshire
E&W 95; 107
Mem E&W 95/107
Gyrnos Fault
E&W 231
H
Fault name
OS map ref
County
BGS map sheet
book reference/s
Hafan Fault
E&W 163
Hawarden Fault
E&W 108
Hendre Fault
E&W 230
Highgate Fault
E&W 164; 165
Hirwaun No 1 Fault
E&W 231
Hirwaun No 2 Fault
E&W 231
Hirwaun No 2a Fault
E&W 231
Hirwaun No 3 Fault
E&W 231
Hudnalls Fault
Monmouthshire
Mem E&W 233/250
I,J,K
Fault name
OS map ref
County
BGS map sheet
book reference/s
Itton Fault
Monmouthshire
Mem E&W 233/250
John Grey's Fault
Glamorganshire
E&W 247
Keepers Lodge Fault
E&W 230
Kilkenny Fault
Glamorganshire
E&W 231; 249
King's Wood Fault
Monmouthshire
Mem E&W 233/250
Kinmel Park Fault
Denbighshire
E&W 95
Mem E&W 95/107
L
Fault name
OS map ref
County
BGS map sheet
book reference/s
Leeswood Fault
E&W 108
Llanbadoc Fault
Monmouthshire
E&W 232; Usk-Cwm:25K
Llancayo Fault
Monmouthshire
E&W 233
Mem E&W 233/250
Llandrindod - Pen-y-waun Fault Belt
E&W 213
Llandyfan Fault
E&W 230
Llandynan Fault
E&W 121
Llanegryn Fault
E&W 149
Llanelidan Fault
E&W 121
Llanerchyraur Fault
E&W 164
Llanerfyl Fault
Powys
E&W 150
Llanfabon Fault
Glamorganshire
E&W 231; 249
Llanfrechfa Fault
Monmouthshire
E&W 249; Usk-Cwm:25K
Llangattock Fault
Mem E&W 233/250
Llanglydwen Fault
E&W 210; 211
Llangollen - Llantysilio - Aqueduct Fault
Smith et al. 2005
Llangollen Fault
E&W 121
Llangwm Fault
Monmouthshire
Mem E&W 233/250
Llanhilleth Fault
Glamorganshire
E&W 249
Llannefydd Fault
Clwyd
E&W 107
Mem E&W 95/107
Llanrhaeadr Fault
Clwyd
E&W 107
Mem E&W 95/107
Llantysilio Fault
E&W 121
Llanvair Discoed Fault
Monmouthshire
Mem E&W 233/250
Llanvair Fault
Monmouthshire
E&W 250
Llanvihangel Fault
Monmouthshire
Mem E&W 233/250
Llanwonno Fault
Glamorganshire
E&W 248
Llanwrtyd Fault
E&W 196
Llanwrtyd Fault
E&W 213
Llechwedd Fault
E&W 164
Llethir Fault
E&W 230
Llety Wilws Fault
E&W 230
Llwyn Celyn Fault
E&W 230
Llwyn Fault
E&W 165
Llyfnant Fault
E&W 163
Llysfaen Fault
Denbighshire
E&W 95
Mem E&W 95/107
Longoaks Fault
Glamorganshire
E&W 247
Lunnon Fault
Glamorganshire
E&W 247
M
Fault name
OS map ref
County
BGS map sheet
book reference/s
Maen Fault
Clwyd
Mem E&W 95/107
Maes-gwyn (or Maes Gwyn) Fault
Clwyd
E&W 107
Mem E&W 95/107
Marian Ffrith (or Marianffrith) Fault
Flintshire
E&W 95
Mem E&W 95/107
Mathern Fault
Monmouthshire
Mem E&W 233/250
Mawddach Fault
E&W 149
Melai Fault
Clwyd
Mem E&W 95/107
Menai Strait Fault System
Brenchley & Rawson 2006
Merthyr Church Fault
Glamorganshire
E&W 231; 249
Meusydd Fault
E&W 230
Minera Fault Belt
E&W 121
Minffordd Fault
Brenchley & Rawson 2006
Mochras Fault
Merionethshire
E&W 135; 49
Brenchley & Rawson 2006
Moelfre Fault
Merionethshire
E&W 135
Moel-Gilau Fault
Glamorganshire
E&W 248
Morfa Fault
Glamorganshire
E&W 247, 248
Morlais Fault
Glamorganshire
E&W 247
Mount Pleasant Fault
E&W 230
Mynydd Bach Fault
E&W 195
Mynydd Bodrochwyn Fault
Clwyd
Mem E&W 95/107
N
Fault name
OS map ref
County
BGS map sheet
book reference/s
Nant Cerrig Fault
Clwyd
Mem E&W 95/107
Nant Marl Fault
E&W 230
Nant y Fedw Fault
E&W 196
Nant-Figillt Fault
E&W 108
Nantmor Fault
Gwynedd
E&W 119
Nantygwrdy Fault
E&W 164
Nantyricket Fault
E&W 164
Nedern Fault
Monmouthshire
Mem E&W 233/250
Nercwys - Nant-Figillt Fault Zone
E&W 108
New House Thrust
E&W 165
Newcastle Fault
Monmouthshire
Mem E&W 233/250
Newlands Thrust
Glamorganshire
E&W 247, 248
Newmarket Fault
Clwyd
Mem E&W 95/107
Newton Fault
Glamorganshire
E&W 247
Newmarket Fault
Flintshire
E&W 95
Newport Sands Fault
E&W 193; 210
Nicholaston Fault
Glamorganshire
E&W 247
O
Fault name
OS map ref
County
BGS map sheet
book reference/s
Ochr-y-cefn Fault
Clwyd
Mem E&W 95/107
Ogof Cadno Fault
E&W 193
Ogof Fault
E&W 163
Olway Brook Fault
Monmouthshire
Mem E&W 233/250
P,Q
Fault name
OS map ref
County
BGS map sheet
book reference/s
Palleg Fault
E&W 230
Palmer's Lake Overthrusts
Pembrokeshire
E&W 244/5
Pant Fault
Denbighshire
E&W 95
Mem E&W 95/107
Pant-y-fotty Fault
Clwyd
Mem E&W 95/107
Paper Mill Fault
E&W 108
Parc Postyn Fault
Clwyd
Mem E&W 95/107
Pared Fault
Gwynedd
E&W 133
Parwyd Fault
Gwynedd
E&W 133
Pendaren Fault
Glamorganshire
E&W 249
Penffordd Fault
Pembrokeshire
E&W 210
Pengam Fault
Glamorganshire
E&W 249
Pennal Fault
E&W 149; 150; 163
Penrhiwfelen Fault
Glamorganshire
E&W 247
Penterry Fault
Monmouthshire
Mem E&W 233/250
Pentre Clwydau Fault
E&W 231
Pentre Felin Fault
Clwyd
Mem E&W 95/107
Pentre Llanharan Thrust
Glamorganshire
E&W 248
Pentremawr Lag Fault
Carmarthenshire
E&W 229
Pentre Tafarn-y-fedw Fault
Clwyd
Mem E&W 95/107
Pentwyn Fault (Mons)
Monmouthshire
E&W 249
Pentwyn Fault (Glams)
Glamorganshire
E&W 249
Pen-y-castell Fault
Glamorganshire
E&W 231, 248
Penydarren Fault
E&W 231
Pen-y-Fan Fault
Monmouthshire
E&W 232
Pen-y-llan Fault
Monmouthshire
E&W 249; Usk-Cwm:25K
Pen-y-parc Fault
Monmouthshire
E&W 249; Usk-Cwm:25K
Plas Isaf Fault
Glamorganshire
E&W 247
Pont Morlais Fault
E&W 230
Pontarsais Fault
E&W 212
Pont-y-ddol Fault
Clwyd
Mem E&W 95/107
Pontypool Road Fault
Monmouthshire
E&W 232
Port Eynon Thrust
Glamorganshire
E&W 246
Portskewett Hill Fault
Mem E&W 233/250
Prestatyn Fault
Clwyd
E&W 95
Mem E&W 95/107
Pwllau Bach Fault
E&W 231
Pwllmawr Fault
Glamorganshire
E&W 247
Pwll-meyric Fault
Monmouthshire
Mem E&W 233/250
R
Fault name
OS map ref
County
BGS map sheet
book reference/s
Ramsey Fault
Pembrokeshire
E&W 209
Reservoir Fault
Monmouthshire
Mem E&W 233/250
Rhadyr Fault
Monmouthshire
Usk-Cwm:25K
Rhaiadr Fault
E&W 137
Rhiw Fault
Glamorganshire
E&W 249
Rhiw Gwraidd Fault
E&W 179
Rhobell Fracture
Brenchley & Rawson 2006
Rhos Fault
Glamorganshire
E&W 231; 232; 249
Rhuallt Fault
Flintshire
E&W 95
Mem E&W 95/107
Rhydding Fault
Glamorganshire
E&W 230; 247
Rhyd Sion Wynn Fault
Clwyd
Mem E&W 95/107
Rhyd-y-creua Fault
Clwyd
Mem E&W 95/107
Ritec Fault
Pembrokeshire
Brenchley & Rawson 2006
Road Uchaf Fault?
Brenchley & Rawson 2006
Rock Park Fault
E&W 196
Rockfield Fault
Monmouthshire
Mem E&W 233/250
S
Fault name
OS map ref
County
BGS map sheet
book reference/s
Sarn-Abersoch Thrust
Gwynedd
E&W 134
Sawdde Fault
E&W 212
Severn Valley Fault Belt
E&W 151
Toghill P. 2006
Siamber Wen Fault
Denbighshire
E&W 95; 107
Mem E&W 95/107
Sirhowy Fault
Monmouthshire
E&W 232
Six Pit Fault
Glamorganshire
E&W 247
Soflen Fault
Clwyd
E&W 107
Mem E&W 95/107
Soughton Fault
E&W 108
St Arvans Fault
Monmouthshire
Mem E&W 233/250
St Brides Fault
Monmouthshire
Mem E&W 233/250
Stradey Fault
Carmarthenshire
E&W 229
Strumble Head Fault
Pembrokeshire
E&W 210
Swansea Fault
Glamorganshire
E&W 247
Swansea Valley Fault
E&W 213
Syddyn Fault
Carmarthenshire
E&W 229
T
Fault name
OS map ref
County
BGS map sheet
book reference/s
Tafalog Fault
Powys
E&W 150
Taipellaf Fault
Clwyd
Mem E&W 95/107
Talgarth Fault
Monmouthshire
Mem E&W 233/250
Tal-y-coed Fault
Monmouthshire
Mem E&W 233/250
Tal-y-llyn Fault
E&W 149
Tanant Fault
E&W 137
Teifi Fault
E&W 212
Tintern Fault
Monmouthshire
Mem E&W 233/250
Tirdonkin Fault
Glamorganshire
E&W 247
Tonfannau Fault
E&W 149
Trafle Fault
Glamorganshire
E&W 247
Trawsfynydd - Cwm Bowyd Fault
Brenchley & Rawson 2006
Trawsfynydd Fault
MW&M:250K, E&W 135
Tredegar Fault
Monmouthshire
E&W 231; 232
Tre-fal-du Fault
Monmouthshire
Mem E&W 233/250
Trelleck Common Fault
Monmouthshire
Mem E&W 233/250
Trelleck Fault
Monmouthshire
Mem E&W 233/250
Tremadog Thrust Zone
Brenchley & Rawson 2006
Tre-'r-ddol Fault
E&W 163
Trevethin Fault
Glamorganshire, Monmouthshire
E&W 232; 249
Trinant Fault
Glamorganshire
E&W 249
Tumble Fault
E&W 230
Tweedle Fault
E&W 231
Twrch Fechan Fault
E&W 230
Twyn Sych Fault
E&W 231
Ty Llwyd Fault
E&W 230
Ty Mawr Fault
Clwyd
Mem E&W 95/107
Tyn-y-caeau Fault (Denb)
Denbighshire
E&W 95
Mem E&W 95/107
Ty'n-y-caeau Fault (Mons)
Monmouthshire
E&W 249; Usk-Cwm:25K
U,V
Fault name
OS map ref
County
BGS map sheet
book reference/s
Upper Artro Fault
Merionethshire
E&W 135
Usk Fault
Monmouthshire
Mem E&W 233/250
Vale of Clwyd Fault
Denbighshire
E&W 121; 95
Mem E&W 95/107
Van Fault
E&W 164
W,X,Y,Z
Fault name
OS map ref
County
BGS map sheet
book reference/s
Warren Fault
E&W 230
Welsh Borderland Fault
Smith et al. 2005
Welsh Borderland Fault System
UK (south) 625K
Brenchley & Rawson 2006
Wenallt Fault
E&W 164
Werf Fault
E&W 231
West Llangerniew Fault
Clwyd
E&W 107
Mem E&W 95/107
Weston Madoc Fault
E&W 165
Wonastow Fault
Monmouthshire
Mem E&W 233/250
Wrexham Fault
E&W 121
Yspytty Ifan Fault
E&W 120
Ystwyth Fault
E&W 179
List of Disturbances
The following named features comprise both faulting and folding;
table of named disturbances
Disturbance name
OS map ref
County
BGS map sheet
book reference/s
Caerbryn Disturbance
Carmarthenshire
E&W 230
Carreg Cennen Disturbance
Carmarthenshire
E&W 230
Clun Forest Disturbance
Cribarth Disturbance
Powys
E&W 230, 231
Llandyfaelog Disturbance
Carmarthenshire
E&W 231
Llannon (or Llanon) Disturbance
Carmarthenshire
E&W 230
Neath Disturbance
E&W 231
Pontyclerc Disturbance
Carmarthenshire
E&W 230
Saron Disturbance
Carmarthenshire
E&W 230
Trimsaran Disturbance
References
Maps
1:625,000 scale geological map 2007, Bedrock Geology UK South , British Geological Survey, Keyworth, Notts (UK (south) 625K )
1:250,000 scale geological map Mid Wales and the Marches , British Geological Survey, Keyworth, Notts (MW & M 250K )
various of 1:50,000 scale geological maps of England and Wales, British Geological Survey, Keyworth, Notts (E & W no. )
1:25,000 scale sheet Usk - Cwmbran in Classic Areas of British Geology series, British Geological Survey, Keyworth, Notts (Usk-Cwm: 25K )
Books
Brenchley, PJ & Rawson, PF (eds) 2006. The Geology of England and Wales , (2nd edn) The Geological Society, London (Brenchley & Rawson 2006 )
Smith et al. 2005 Structure & Evolution of the south-west Pennine Basin and adjacent area. Subsurface memoir of the British Geological Survey. (Smith et al. 2005 )
Toghill, P 2006 Geology of Shropshire (2nd edn) Crowood Press, Wilts (Toghill P 2006 )
Warren et al 1984, Geology of the country around Rhyl and Denbigh , Mem Br Geol Svy, sheets 95 and 107 (Mem E&W 95/107 )
Welch, FBA & Trotter, FM 1961 Geology of the Country around Monmouth and Chepstow , HMSO (explanation of 1" geol. sheets 233 & 250 (England and Wales) (Welch, FBA & Trotter, FM 1961 )
See also