Malacological evidence relating to the insularity of the British Isles during the Quaternary
article
The marine molluscan faunas from different temperate stages of the Pleistocene of the North Sea vary enormously both in terms of species richness and in the diversity of their biogeographical composition. The marine assemblages from the Middle Tiglian, Eemian and Holocene have all yielded c100 species or more, including many with southern or "Lusitanian' affinities. It is thought that during these stages the Strait of Dover was open, allowing entry of these southern taxa into the southern North Sea. Conversely, the temperate stages from the Late Tiglian up to and including the Holsteinian have yielded relatively inmpoverished faunas virtually lacking any of the southern elements. During these stages it would appear that the Strait of Dover was closed.
Topics
TNO Identifier
233131
Source
Island Britain: a Quaternary perspective, pp. 89-110.
Publisher
Geological Society, London; Special Publication, 96
Pages
89-110
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