Lyell Collection
Journal of the Geological Society
Lyell Centre  |   Lyell Collection  |   Subscriptions   |   Geological Society  |   Email alerts  |   Online bookshop  |   Help

Keywords:
Author:
Advanced search>>
This Article
Right arrow Figures Only
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow Request Permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via ISI Web of Science (11)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Jansson, K. N.
Right arrow Articles by Glasser, N. F.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation
Journal of the Geological Society; 2005; v. 162; issue.1; p. 25-37;
DOI: 10.1144/0016-764904-009
© 2005 Geological Society of London

Original Article

Palaeoglaciology of the Welsh sector of the British–Irish Ice Sheet

Krister N. Jansson* & Neil F. Glasser

Centre for Glaciology, Institute of Geography and Earth Sciences, University of Wales, Aberystwyth SY23 3DB, UK
AFF *Present address: Department of Physical Geography and Quaternary Geology, Stockholm University, SE-106 91 Stockholm, Sweden (e-mail: krister@natgeo.su.se)

This palaeoglaciological reconstruction, based on the distribution of glacial lineations interpreted from satellite imagery, considers the extent, thickness and dynamics of the Welsh Ice Cap and its interaction with the British–Irish Ice Sheet. Two major ice-flow events were identified. The oldest phase of ice flow (Event I) is characterized by ice flowing from an ice dispersal centre situated over the higher terrain in north–central Wales and by ice thick enough to cover the mountain summits. At this time the interior of the ice cap is inferred to have been dominated by cold-based ice. During the growth of the Welsh Ice Cap it became confluent with the British–Irish Ice Sheet. The Welsh Ice Cap at this time was again sufficiently thick to submerge the highest mountain summits. The youngest detected phase of ice flow (Event II) was marked by an abrupt change in the dynamics of the Welsh Ice Cap. During Event II the Welsh Ice Cap was drained by at least four ice streams, which followed major troughs in northern and eastern Wales.

Key Words: Wales • ice caps • ice movement • reconstructions • satellite methods




This article has been cited by other articles:


Home page
 Journal of the Geological SocietyHome page
D.P. Le Heron and J. Craig
First-order reconstructions of a Late Ordovician Saharan ice sheet
Journal of the Geological Society, 2008; 165: 19 - 29.
[Abstract] [Full Text] [PDF]