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Quarterly Journal of the Geological Society

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Quarterly Journal of the Geological Society; 1963; v. 119; issue.1-4; p. 438-443;
DOI: 10.1144/gsjgs.119.1.0438
© 1963 Journal of the Geological Society, London, Legacy

Discussion

Mr H. E. WILSON said that during the resurvey of 1-in. sheets 7 and 8 by the Geological Survey a few years ago he had examined much of the ground covered by this paper. Although he agreed with the author’s general thesis he could not accept all his conclusions.

The Kinbane volcano was discussed in a paper read to the British Association in 1957 by Mr A. Fowler, then District Geologist in Northern Ireland. Like the author, Fowler described the area as a vent with foundered masses of chalk and lava, but he put the eastern margin of the vent to the west of the headland of Kinbane. The speaker considered that the Kinbane area showed the peripheral features of a major vent, sited off shore, which had given rise to tuff beds at at least two different periods during Lower Basalt times. The Chalk at Kinbane was cataclastically shattered but was not an agglomerate, though it was penetrated by small tuffpipes near the castle and by two small vents on the foreshore to the west. The speaker could recognize no features in the area exposed that could be the margins or walls of a major vent.

That post-solidification collapse of the basalt lavas into hollows in the underlying Chalk could produce agglomerate-like pipes could be demonstrated in Cape-castle quarry, some 5 miles south of the coast section. Here, these features were demonstrably post-glacial. Any 'agglomerates' seen in plan, or in restricted sections, near the base of the lavas must

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This 250-word extract was created in the absence of an abstract.