This is a list of the named geological folds affecting the rocks of

Great Britain Great Britain is an island in the North Atlantic Ocean off the northwest coast of continental Europe. With an area of , it is the largest of the British Isles, the largest European island and the ninth-largest island in the world. It is ...

and the

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Terminology

See the main article on folds for a fuller treatment of fold types and nomenclature but in brief, an

anticline In structural geology, an anticline is a type of fold that is an arch-like shape and has its oldest beds at its core, whereas a syncline is the inverse of an anticline. A typical anticline is convex up in which the hinge or crest is the ...

is an arch-like fold whereas a

syncline In structural geology, a syncline is a fold with younger layers closer to the center of the structure, whereas an anticline is the inverse of a syncline. A synclinorium (plural synclinoriums or synclinoria) is a large syncline with superimpose ...

is its converse; a downfold. Antiforms, anticlinoria, synforms and synclinoria are variations on these. A

monocline A monocline (or, rarely, a monoform) is a step-like fold in rock strata consisting of a zone of steeper dip within an otherwise horizontal or gently-dipping sequence. Formation Monoclines may be formed in several different ways (see diagram) * ...

(or, rarely, a monoform) is a step-like fold, one limb of which is roughly horizontal. Both

dome A dome () is an architectural element similar to the hollow upper half of a sphere. There is significant overlap with the term cupola, which may also refer to a dome or a structure on top of a dome. The precise definition of a dome has been a m ...

s and periclines are anticlines in which the

strata In geology and related fields, a stratum ( : strata) is a layer of rock or sediment characterized by certain lithologic properties or attributes that distinguish it from adjacent layers from which it is separated by visible surfaces known as ei ...

fall away about equally in all directions. There are also a number of ' disturbances' named in parts of the country, notably in

South Wales South Wales ( cy, De Cymru) is a loosely defined region of Wales bordered by England to the east and mid Wales to the north. Generally considered to include the historic counties of Glamorgan and Monmouthshire, south Wales extends westwards ...

. These linear features are a combination of faults and folds - the relative importance of faulting and folding varying along the length of each disturbance.

List of folds

Key to table

*Column 1 indicates the name of the fold. Some variant spellings are recorded between sources. *Column 2 indicates the

county A county is a geographic region of a country used for administrative or other purposesChambers Dictionary, L. Brookes (ed.), 2005, Chambers Harrap Publishers Ltd, Edinburgh in certain modern nations. The term is derived from the Old French ...

in which the fold occurs. Some traverse two or more counties of course. *Column 3 indicates in which of the constituent countries of

the fold lies. (Note that the

does not form a part of Great Britain but is included here for convenience.) *Column 4 indicates on which 1:50,000 or 1" scale geological map sheet published by the

British Geological Survey The British Geological Survey (BGS) is a partly publicly funded body which aims to advance geoscientific knowledge of the United Kingdom landmass and its continental shelf by means of systematic surveying, monitoring and research. The BGS h ...

(BGS) the fold is shown and named (either on map/s or cross-section/s or both). 'E&W' signifies the series of sheets published to cover England and Wales. A handful of maps at other scales are also listed where they depict the feature concerned. *Column 5 indicates a selection of publications in which references to the fold may be found. See references section for full details of publication.

List of Disturbances

The following named features comprise both faulting and folding;

References

Maps

* 1:625,000 scale geological map 2007, ''Bedrock Geology UK North'', British Geological Survey, Keyworth, Notts (''UK north 625K'') * 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 (''Mid Wales & Marches 250K'') * various of 1:50,000 scale geological maps of England and Wales, British Geological Survey, Keyworth, Notts (''E & W no.'') * 1:50,000 scale geological map; Scotland Special Sheet ''Assynt'', British Geological Survey, Keyworth, Notts (''Assynt (Special 50K)'') * 1:50,000 scale geological map; Special Sheet ''Isle of Man'', British Geological Survey, Keyworth, Notts (''IoM (50K special sheet)'')

Books

* Aitkenhead, N. et al. 2002. ''British Regional Geology: the Pennines and adjacent areas'' (4th edn) British Geological Survey, Nottingham (''BGS:BRG 8'') * Allen, J R L, Thomas, R L, and Williams, B P J. 1982. The Old Red Sandstone north of Milford Haven. 123–149 in ''Geological excursions in Dyfed, south-west Wales''. BASSETT, M G (editor). (Cardiff: Published for the Geologists’ Association by the National Museum of Wales.) (''Allen et al 1982'') * Barclay, W.J. 2011 Geology of the Swansea District - a brief explanation of the geological map ''Sheet explanation of the British Geological Survey'' 1:50K sheet 247 Swansea (England and Wales) (Brief expln to E&W 247, 2011) * Barton et al. 2011. ''Geology of South Dorset and South-east Devon and its World Heritage Coast'', Special Memoir of the British Geological Survey (''Mem E&W 328etc'') * Brenchley, P.J. & Rawson, P.F. (eds) 2006. ''The Geology of England and Wales'', (2nd edn) The Geological Society, London (''Brenchley & Rawson 2006'') * Cope, J.C.W. 2012 ''GA Guide no 22: Geology of the Dorset Coast'', Geologists' Association, (''GA Guide22'') * Day J.B.W. 1970
''Geology of the Country around Bewcastle''
London:HMSO (''Day 1970'') * Earp, J.R. & Hains, B.A. 1971
''British Regional Geology: Welsh Borderland (3rd edn)''
London:HMSO (''Earp & Hains 1971'') * Emeleus, C.H. & Bell, B.R. 2005. ''British Regional Geology:the Palaeogene volcanic districts of Scotland'' (4th edn) British Geological Survey, Nottingham (''BGS:BRG 3'') * Goodenough, K.M. & Krabbendam, M. 2011 ''A Geological Excursion Guide to the North-west Highlands of Scotland'', Edinburgh Geological Society, (''G & K 2011'') * Green, G.W. 1992 ''British Regional Geology: Bristol and Gloucester Region''(3rd edn), London, HMSO for British Geological Survey (''BGS:BRG 16'') * Hains, B.A. & Horton, A., 1969 ''British Regional Geology: Central England'', London, HMSO for British Geological Survey (''BGS:BRG 10'') * Johnstone, G.S. & Mykura, W., 1989 ''British Regional Geology: The Northern Highlands of Scotland'', (4th edn) London: HMSO for the British Geological Survey (''BGS:BRG 2'') * Kent, P., Gaunt, G.D. & Wood, C.J., 1980 . ''British Regional Geology:Eastern England from the Tees to The Wash'', London HMSO (''BGS:BRG9'') * Mykura, W. 1976 ''British Regional Geology: Orkney and Shetland'', Institute of Geological Sciences, Edinburgh: HMSO for the British Geological Survey (''BGS:BRG 1'') * Plant, J.A., Jones, D.G. & Haslam H.W. 1999 ''The Cheshire Basin: basin evolution, fluid movement and mineral resources in a Permo-Triassic rift setting'', British Geological Survey, Nottingham (''Plant et al. 1999'') * 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'') * Stone et al. 2010. ''British Regional Geology: Northern England'' (5th edn) British Geological Survey, Nottingham (''BGS:BRG 7'') * Toghill, P. 2006 ''Geology of Shropshire'' (2nd edn) Crowood Press, Wilts (''Toghill P 2006'') * Trewin, NH (ed) 2002. ''The Geology of Scotland''. The Geological Society, London (''Trewin (ed) 2002'') * 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'') * Webby, B.D. 1965 ''Proceedings of the Geologists' Association''. volume 76, part 1 (''Proc.Geol.Ass'n v76, pt1, 1965'') * Welch, F.B.A. & Trotter, F.M. 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'')