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Was the cirque glaciation of Wales time-transgressive, or not?

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The lowest glacial cirques in Wales are in the South Wales Coalfield and in western mid-Wales: the highest are in the northeast and on the highest mountains. Floor altitudes show great local variability, but in general rise to the northeast in most of Wales and northward in southern Wales, as does the former glaciation level (from 470–710 m a.s.l.). The pattern is similar for reconstructed Younger Dryas glaciers, which occupied the higher and even some of the lower cirques. If cirque development had spread to lower areas as the ice sheet built up, cirques would be expected in peripheral areas such as the northeast and southwest, away from the main ice-sheet sources. This is not seen and there is no clear evidence of time-transgressive cirque glaciation. Cirques relate to phases of glaciation with an ELA a little below that in the Younger Dryas.

Document Type: Research Article


Publication date: 1999-01-01

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  • The Annals of Glaciology is a peer-reviewed, thematic journal published 2 to 4 times a year by the International Glaciological Society (IGS). Publication frequency is determined and volume/issue numbers assigned by the IGS Council on a year-to-year basis and with a lead time of 3 to 4 years. The Annals of Glaciology is included in the ISI Science Citation Index from volume 50, number 50 onwards.

    Themes can be on any aspect of the study of snow and ice. Individual members can make a suggestion for a theme for an Annals issue to the Secretary General, who will forward it to the IGS Publications Committee. The IGS Publication Committee will make a recommendation for an individual themed Annals issue, together with a potential Annals Chief Editor for that issue, to IGS Council. The IGS Council will make the decision whether to proceed, taking into account the spread of topics and the overall capacity for publication of pages in Annals.

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