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IV.—The Volcanic History of Ireland

Being the Anniversary Address delivered to the Royal Geological Society of Ireland, February 11th, 1874

Published online by Cambridge University Press:  01 May 2009

Edward Hull
Affiliation:
Director Geological Survey of Ireland.

Extract

Carboniferous Period.—The Lower Carboniferous rocks, both of the North of England, of Scotland, and of Ireland, afford examples of contemporaneous volcanic action of considerable intensity. The so-called “toad-stones” of Derbyshire, and the great sheets of melaphyre, porphyrite, and ashes of the central valley of Scotland, forming the Kilpatrick, Campsie, and Dairy Hills, appear to have been erupted over the bed of the same sea as that in which were poured out similar materials in County Limerick, forming the well-known Carboniferous volcanic rocks of “the Limerick Basin.” These rocks have been already so fully described by several observers, that I shall confine myself to a very short description, such as is essential to the brief history of volcanic action which I am here endeavouring to draw up.

Type
Original Articles
Copyright
Copyright © Cambridge University Press 1874

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References

page 205 note 1 The composition of the Knockdirk trap is essentially so different from that of the other masses, that I suspect it to belong to an older period of eruption. See author's paper on “The Microscopic Structure of the Limerick Trap-rocks,” Geological Magazine, 1873, Vol. X. p. 153, Pl. VIII.Google Scholar

page 206 note 1 Geol. Survey Map, Sheet 198, with “Explanations” to Sheets 197 and 198 (1860). Also Mr. Kmahan on “The Igneous Bocks of Berehaven,” Journ. Geol. Soc. Dublin, vol. vii.Google Scholar

page 207 note 1 Brit, Assoc. Report, 1856, p. 66.Google Scholar

page 208 note 1 Quart. Journ. Geol. Soc. Lond. vol. xxv. p. 357 (with plates).Google Scholar