Vistulian periglacial phenomena in South-West Wales
DOI:
https://doi.org/10.26485/BP/1973/22/10Keywords:
solifluction deposits, fossil ice wedges, Vistulian periglacial phasesAbstract
Four models are presented concerning the development and preservation of periglacial phenomena in Western Britain. Occurrences of solifluction deposits, fossil ice wedges and other periglacial features are described from South-West Wales, and are related to the Pleistocene stratigraphy of the area. Solifluction deposits are frequently thick beneath the glacial drifts, but are much thinner above. It is suggested that South-West Wales experienced a prolonged Early and Middle Vistulian periglacial phase and a short but severe periglacial phase following Late Vistulian dissolution of the Irish Sea Glacier. Field evidence is found to accord fairly closely with the expected distribution and nature of the various phenomena. The Vistulian glaciation limit should not be unsed as a line marking the northern limit of extensive periglacial features in Great Britain; such features may in fact be more common within the limit than in the south of England.
References
Bowen, D. Q., 1966 - Dating Pleistocene events in south-west Wales. Nature, vol. 211 (5048); p. 475-6.
Bowen, D. Q., 1970a - South-east and central Wales. in: Lewis, C. A. (ed) - The Glaciations of Wales and Adjoining Regions. Longmans, Ch. 9; p. 197-227.
Bowen, D. Q., 1970b - The Palaeoenvironment of the "Red Lady" of Paviland. Antiquity, 44; p. 134-136.
Budel, J., 1959 - Periodische und episodische Solifluktion im Rahmen der klimatischen Solifluktionstypen. Erdkunde, Bd. 13; p. 297-314.
Charlesworth, J. K., 1929 - The South Wales End-moraine. Quart. Jour. Geol. Soc. London, vol. 85; p. 335-358.
Cox, A. H., et al, 1930 - The geology of the St. David's district, Pernbrokeshire. Proc. Geol. Assoc., London, vol. 41; p. 241-273.
Cruickshank, J. G. and Colhoun, E. A., 1965 - Observations on pingos and other landforms in Schuchertdal, north-east Greenland. Geogr. Annaler, vol. 47; p. 224-36.
Dylik, J. and Maarleveld, G. C., 1967 - Frost cracks, frost fissures and related polygons. Meded. Geol. Stichting, N.s., Bd. 18; p. 7-21.
Evans, W. D., 1945 - The Geology of the Prescelly Hills, North Pembrokeshire. Quart. Jour. Geol. Soc. London, vol. 101; p 89-110.
Flint, R. F., 1971 - Glacial and Quaternary Geology. Wiley; 892 pp.
Galloway, R. W., 1961 - Periglacial phenornena in Scotland. Geogr. Annaler, vol. 43; p. 348-353.
George, T. N., 1933 - The Quaternary beaches of Gower. Proc. Geol. Assoc. London, vol. 43; p. 291-324.
Grove, J. M., 1966 - The Little lee Age in the Massif of Mont Blanc. I. B. G. Trans., vol. 40; p. 129-143.
Guillien, Y., 1964 - Les grezes litees cornme depóts cyclothemiques. Zeitschr.f. Geomorph., N.F., Supp. Bd. 5; p. 53-58.
Hartshorn, J. H., 1961 - Evidence for local glacier stagnation in East Greenland. U.S Geol. Survey Research, Paper 227; p. 216-218.
Jehu, T. J., 1904 - The glacial deposits of northern Pembrokeshire. Trans. Roy. Soc. Edinbourgh, vol. 41; p. 53-87.
John, B. S., 1965a - Aspects of the glaciation and superficial deposits of Pembrokeshire. D. Phil. thesis (unpublished), Univ. of Oxford, 2 vols.
John, B. S., 1965b - A possible Main Wilrm glaciation in West Pembrokeshire. Nature, vol. 207 (4997); p. 622-3.
John, B. S., 1968a - Age of raised beach deposits of south-western Britain. Nature, vol. 218 (5142); p. 665-7.
John, B. S., 1968b - Directions of ice movement in the southern Irish Sea basin during the last major glaciation: an hypothesis. Jour. Glac., vol. 7; p. 507-510.
John, B. S., 1970a - Pembrokeshire. Chapter 10 in: Lewis, C. A. (ed) - The glaciations of Wales and adjoining regions. Longmans, p. 229-265.
John, B. S., 1970b - The Pleistocene Drift Succession at Porth-clais, Pembrokeshire. Geol. Mag., vol. 107; p. 439-457.
John, B. S. and Ellis-Gruffydd, I. D., 1970 - Weichselian stratigraphy and Radiocarbon Dating in South Wales. Geol. en Mijnbouw, vol. 49; p. 285-296.
Johnsson, G., 1959 - True and false ice-wedges in Southern Sweden. Geogr. Annaler, vol. 41; p. 15-33.
Jones, O. T., 1965 - The glacial and post-glacial history of the lower Teifi valley. Quart. Jour. Geol. Soc. London, vol. 121; p. 247-81.
Kerney, M. P., 1963 - Late-glacial deposits on the chalk of South-East England. Phil. Trans. Roy. Soc., B., vol. 246; p. 203-54.
Lacaille, A. D. and Grimes, W. F., 1955 - The Prehistory of Caldey. Archaeol. Cambrensis, 104; p. 85-165.
Linton, D. L., 1955 - The problem of tors. Geog. Jour., vol. 121; p. 470-81.
Manley, G., 1951 - Range of variation of the British climate. Geog. Jour., vol. 117; p. 43-65.
Mercer, J. H., 1969 - The Allerod oscillation: a European climatic anomaly? Arctic and Alpine Research, vol. 1 (4); p. 227-234.
Mitchell, G. F., 1960 - The Pleistocene history of the Irish Sea. Adv. Sci., vol. 68; p. 313-25.
Mitchell, G. F., 1962 - Summer field meeting in Wales and Ireland. Proc. Geol. Assoc. London, vol. 73; p. 197-213.
Pewe, T. L., 1966 - Palaeoclimatic significance of fossil ice wedges. Biuletyn Peryglacjalny, no. 15; p. 65-73.
Pewe, T. L., 199 - The Periglacial Environment, Ch. 1 in: Pewe, T. L. (ed) - The Periglacial Enviroment: Past and Present. Montreal; p. 1-9.
Poser, H., 19470 - Dauerfrostboden und Temperaturverhaltnisse wahrend der WurmEiszeit im nicht vereisten Mittel-und Westeuropa. Naturwissenschaften, Bd. 34; p. 1-8.
Prestwich, J., 1892 - The raised beaches and "head" or rubble-drift of the south of England. Quart. Jour. Geol. Soc. London, vol. 48; p. 263-343.
Savigear, R. A. G., 1953 - Some observations on slope development in South Wales. Trans. I. B. G., vol. 18; p. 31-52.
Shotton, F. W., 1960 - Large scale patterned ground in the valley of the Worcestershire Avon. Geol. Mag., vol. 97; p. 404-408.
Stephens, N., 1966 - Some Pleistocene deposits in north Devon. Biuletyn Peryglacjalny, no. 15; p, 103-14.
Stephens, N., 1970 - The West Country and Southern Ireland. Ch. 11 in: Lewis, C.A. (ed) - The glaciations of Wales and adjoining regions. Longmans; p. 267-314.
Synge, F. M., 1950 - The glacial deposits around Trim, Co. Meath. Proc. Roy. Irish Acad., no. 53 (b); p. 99-110.
Synge, F.m., 1963 - A correlation between the drifts of S.E. Ireland with those of W. Wales. Irish Geogr., vol. 5; p. 73-82.
Synge, F. M., 1970 - The Pleistocene Period in Wales. Ch. 12 in: Lewis C.A. (ed) - The Glaciations of Wales and adjoining regions. Longmans; p. 315-350.
Te Punga, M. T., 1957 - Periglaciation in Southern England. Tijdschr. Kon. Ned. Aardr. Gen., Bd. 64; p. 401-12.
Thomas, G. S. P., 1971 - Field Guide to the Easter Excursion to the Isle of Man. Quat. Res. Ass. (Dept. of Geog., Univ. of Liverpool); 55 pp.
Tricart, J., 1969 - Geomorphology of Cold Environrnents (trans. by Edward Watson). Macmillan, 320 pp.
Washburn, A. L. and Stuiver, M., 1962 - Radiocarbon dated postglacial delevelling in north-east Greenland and its implications. Arctic, vol. 15; p. 66-73.
Waters, R. S., 1961 - Involutions and ice-wedges in Devon. Nature, vol. 189; p. 389-390.
Watson, E., 1965a - Periglacial structures in the Aberystwyth region of central Wales. Proc. Geol. Assoc. London, vol. 76; p. 443-62.
Watson, E., 1965b - Grezes litees ou eboulis ordonnes tardiglaciaires dans la region d'Aberyswyth. Bull. Ass. Geogr. Fr., no. 338-9; p. 16-25.
Watson, E., 1966 - Two nivation cirques near Aberystwyth, Wales. Biuletyn Peryglacjalny, no. 15; p. 79-101.
Watson, E., 1969 - The periglacial landscape of the Aberystwyth region, Ch. 3 in: Bowen, E. G., et al. (eds) - Geography at Aberystwyth. Cardiff; p. 35-49.
Watson, E., 1970 - The Cardigan Bay Area. Ch. 6 in: Lewis, C. A. (ed)- The glaciations of Wales and adjoining regions. Longmans; p. 125-145.
Watson, E. and Watson, S., 1967 - The periglacial origin of the drifts of Morfa Bychan, near Aberystwyth. Geol. Jour., vol. 5; p. 419-40.
West, R. G., 1968 - Pleistocene Geology and Biology. Longmans.
Whittow, J. B. and Ball, D. F., 1970 - North-West Wales. Ch. 2 in: Lewis, C. A. (ed) - The glaciations of Wales and adjoining regions. Longmans; p. 21-58.
Williams, K. E., 1927 - The glacial drifts of western Cardiganshire. Geol. Mag., vol. 64; p. 205-27.
Williams, R.B.G., 1964 - Fossil Patterned ground in eastern England. Biuletyn Peryglacjalny, no. 14; p. 337-349.
Williams, R.B.G., 1965 - Permafrost in England during the last glacial period. Nature, vol. 205; p. 1304-5.
Williams, R.B.G., 1969 - Permafrost and temperature conditions in England during the last glacial period. In: Pewe, T. L. (ed) - The Periglacial Environment: Past and Present. Montreal; p. 399-410.
Wood, A., 1959 - The erosional history of the cliffs around Aberystwyth, L'pool and Manch. Geol. Jour., vol. 2 (2); p. 271-287.
Wood, A., 1962 - in: Coastal Cliffs: Report of a Symposium. Geog. Jour., vol. 128; p. 307-9.
Worsley, P., 1966 - Fossil frost wedge polygons at Congleton, Cheshire, England. Geog. Annaler, vol. 48a; p. 211-219.
Worsley, P., 1970 - The Cheshire - Shropshire Lowlands. Ch. 4 in: Lewis, C. A. (ed) - The glaciations of Wales and adjoining regions. Longmans; p. 83-106.
Zagwijn, W. and Paepe, R., 1968 - Die Stratigraphie der weichselzeitlichen Ablagerungen der Niederlande und Belgiens. Eiszeitalter u. Gegenwart, Bd. 19; p. 129-146.
Zeuner, F. E., 1959 - The Pleistocene Period. (2nd ed), London.
