Devensian glacigenic sedimentation and landscape evolution in the Cardigan area of southwest Wales

H...............H

Show simple item record

dc.contributor.author Waters, R. A.
dc.contributor.author Davies, J. R.
dc.contributor.author Glasser, Neil F.
dc.contributor.author Hambrey, Michael J.
dc.date.accessioned 2008-12-12T15:51:02Z
dc.date.available 2008-12-12T15:51:02Z
dc.date.issued 2001-07
dc.identifier.citation Waters , R A , Davies , J R , Glasser , N F & Hambrey , M J 2001 , ' Devensian glacigenic sedimentation and landscape evolution in the Cardigan area of southwest Wales ' Journal of Quaternary Science , vol 16 , no. 5 , pp. 455-482 . , 10.1002/jqs.639 en
dc.identifier.issn 0267-8179
dc.identifier.other PURE: 94649
dc.identifier.other dspace: 2160/1585
dc.identifier.uri http://hdl.handle.net/2160/1585
dc.description Hambrey, Michael, Davies, J.R., Glasser, N.F., Waters, R.A., (2001) 'Devensian glacigenic sedimentation and landscape evolution in the Cardigan area of southwest Wales', Journal of Quaternary Science 16(5) pp.455-482 RAE2008 en
dc.description.abstract The depositional processes associated with late Devensian ice in areas bordering the Irish Sea basin have been the subject of considerable debate. Among the key areas around the Irish Sea, southwest Wales occupies a particularly crucial position because it is here that ice flowing from the north impinged upon the coast orthogonally and encroached inland. Two main hypotheses have emerged concerning deglaciation of the Irish Sea basin. The traditional hypothesis holds that sedimentation was ice-marginal or subglacial, whereas an alternative hypothesis that emerged in the 1980s argued that sedimentation was glaciomarine. Southwest Wales is well-placed to contribute to this debate. However, few detailed sedimentological studies, linked to topography, have been made previously in order to reconstruct glacial environments in this area. In this paper, evidence is presented from four boreholes drilled recently in the Cardigan area, combined with data from coastal and inland exposures in the lower Teifi valley and adjacent areas. A complex history of glaciation has emerged: (i) subglacial drainage channel formation in pre-Devensian time, (ii) deposition of iron-cemented breccias and conglomerates possibly during the last interglacial (or in the early/mid-Devensian interstadial), (iii) late Devensian ice advance across the region, during which a glaciolacustrine sequence over 75 m thick accumulated, within a glacial lake known as Llyn Teifi, (iv) a second high-level glaciolacustrine succession formed near Llandudoch, (v) outside the Teifi valley, ice-marginal, subglacial and glaciofluvial sediments were also laid down, providing a near-continuous cover of drift throughout the area. Glacial advance was characterized by reworking, deformation and sometimes erosion of the underlying sediments. The glaciomarine hypothesis is thus rejected for southwest Wales. en
dc.format.extent 28 en
dc.language.iso eng
dc.relation.ispartof Journal of Quaternary Science en
dc.title Devensian glacigenic sedimentation and landscape evolution in the Cardigan area of southwest Wales en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1002/jqs.639
dc.contributor.institution Institute of Geography & Earth Sciences en
dc.contributor.institution Centre for Glaciology en
dc.description.status Peer reviewed en


Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Search Cadair


Advanced Search

Browse

My Account