Hostname: page-component-586b7cd67f-t8hqh Total loading time: 0 Render date: 2024-11-23T22:26:29.695Z Has data issue: false hasContentIssue false
  • English
  • Français

Geological Studies in the Dublin District. I. The Heavy Minerals of the Granite and the Contiguous Rocks in the Ballycorus District

Published online by Cambridge University Press:  01 May 2009

F. Smithson
Get access Rights & Permissions [Opens in a new window]

Extract

From the southern shores of Dublin Bay there stretches to the south-west a broad granite intrusion with rocks of supposed Ordovician age on both sides of it. These rocks are metamorphosed near the granite, and the belt of metamorphism is wider on the south-east than on the north-west side, indicating, no doubt, that the plane of junction dips more steeply on the latter side. Near Dublin the Lower Carboniferous rocks rest unaltered upon the granite. On the south-east side, in the northern part of the county of Wicklow, the belt of Ordovician rocks is only some 2 miles wide, and a large area of supposed Cambrian rocks lies between it and the sea. Around the hill of Carrickgollogan a. patch of similar rocks appears incongruously in the middle of the Ordovician belt. After a study of the region to the south of Dublin one seems to be naturally drawn towards this small area around Carrickgollogan, for it presents a problem, the key to which may explain the geological structure of a much wider area.

Type
Original Articles
Information
Geological Magazine , Volume 65 , Issue 1 , January 1928 , pp. 12 - 25
Copyright
Copyright © Cambridge University Press 1928

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

BIBLIOGRAPHY

1869. Geological Survey Memoir to Sheets 121 and 130.Google Scholar
1889. Sollas, W. J. “Contributions to a Knowledge of the Granites of Leinster”: Trans. Roy. Irish Acad., vol. xxix, pp. 427–514.Google Scholar
1892. Sollas, W. J. “On the Structure and Origin of the Quartzite Rocks in the Neighbourhood of Dublin”: Sci. Proc. Roy. Dublin Soc., vol. vii, p. 169.Google Scholar
1898. O'Reilly, J. P. “;On the Occurrence of Anatase and Brookite in the Quartzites of Shankill”: Sci. Proc. Roy. Dublin Soc., vol. viii, p. 732.Google Scholar
1903. Geological Survey Memoir to Sheet 112. (Contains a very full bibliography.)Google Scholar
1908. Handbook to Dublin and the Surrounding District. (British Association.) Cole G. A. J. Geology., Kilroe J. R. Glacial Deposits. Seymour H. J. Mineralogy.Google Scholar
1912. Ryan, W. J., and Hallissy, T. “Preliminary Notice of some New Fossils from Bray Head, County Wicklow”: Proc. Roy. Irish Acad., vol. xxixb, pp. 246–51.Google Scholar
1921. Cole, G. A. J. “The Problem of the Bray Series”: Proc. Roy. Irish Acad., vol. xxxvib, pp. 1–10.Google Scholar
1922. Smyth, L. B. “On a Variety of Pinite occurring at Ballycorus, County Dublin”: Sci. Proc. Roy. Dublin Soc., vol. xvi (N.S.), p. 492.Google Scholar
1926. Farrington, A. “Topographical Features of the Granite-Schist Junction of the Leinster Chain”: Proc. Roy. Irish Acad., vol. xxxviib.Google Scholar