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A System of Joints on the Surface of Basalt Columns at the Giants Causeway

Published online by Cambridge University Press:  01 May 2009

Herbert P. T. Rohleder
Herbert P. T. Rohleder
Affiliation:
Royal College of Science, London.
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Extract

When studying the geology of the Giants Causeway district in 1924 I noticed a strange system of well-developed joints on the surface of some basalt columns. As these only appeared on the planes of a few columns in this district, where several hundred thousand basalt columns are exposed, and as these joints were only to be found on and quite close to the surface, I firstly regarded them as a mere feature of weathering. It was only after Professor Dr. Maximilian Weber in Munich pointed out to me the striking resemblance of these joints to the photos published in Daubrée's Études synthétiques de Géologie Experimentale, and I decided to investigate this problem closer, the results of which are given as follows:–

This system of joints is only to be found at one locality in the Giants Causeway district, i.e. the lower parts (sea level) of the “Grand Causeway” (west side) opposite the “wishing chair” (the spot is marked with a white X on Fig. 1, Pl. XIV).

Type
Original Articles
Information
Geological Magazine , Volume 65 , Issue 8 , August 1928 , pp. 354 - 355
Copyright
Copyright © Cambridge University Press 1928

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References

page 354 note 1 Rohleder, H. P. T., “Das Giants Causeway Gebiet”: Zeitschrift für Vulkanologie, 1927, Berlin.Google Scholar

page 355 note 2 Q.J.G.S., London, 1925, Anniversary Address, p. 1, xxx.Google Scholar