Hostname: page-component-745bb68f8f-lrblm Total loading time: 0 Render date: 2025-01-10T05:19:39.570Z Has data issue: false hasContentIssue false
  • English
  • Français

III.—Some Tertiary Dykes of the Clyde Area

Published online by Cambridge University Press:  01 May 2009

G. W. Tyrrell A.R.C.Sc., F.G.S.
G. W. Tyrrell A.R.C.Sc., F.G.S.
Affiliation:
Lecturer in Mineralogy and Petrology, Glasgow University.
Get access Rights & Permissions [Opens in a new window]

Extract

Leidleite and Inninmorite.—Typical rocks of these groups are as yet unknown in the Clyde area. A N.N.W. dyke at Barrassie Sands, near Troon (Ayrshire), has points in common with leidleite. It shows anorthite phenocrysts in a subvariolitic groundmass of acicular felspar and augite, enveloped in a partially devitrified glassy base. A north–south dyke at the north end of Loch Fad, Bute, may perhaps be regarded as a doleritic end-variety of leidleite (see Anderson & Radley, 1916, fig. 2b, p. 208). A pitchstone-like dyke from the Smurig Burn in the south of Arran has all the characters of leidleite, except that it carries rather abundant granular augite, instead of acicular crystals.

Type
Original Articles
Information
Geological Magazine , Volume 4 , Issue 8 , August 1917 , pp. 350 - 356
Copyright
Copyright © Cambridge University Press 1917

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

Anderson, (E. M.) and Radley, (E. G.). 1916. “The Pitchstones of Mull and their Genesis”: Q.J.G.S., lxxi, pp. 205–17.Google Scholar
Clough, (C. T.). 1897. In The Geology of Cowal, Mem. Geol. Surv., pp. 126–71.Google Scholar
Flett, (J. S.). 1911. In The Geology of Knapdale, Jura, and North Kintyre, Mem. Geol. Surv., pp. 116–18.Google Scholar
Geikie, (Sir A.). 1880. “The ‘Pitchstone’ of Eskdale”: Proc. Roy. Phys. Soc. Edinb., vol. v, pp. 219–55.Google Scholar
Geikie, (Sir A.) 1897. Ancient Volcanoes of Great Britain, vol. ii, pp. 118–80.Google Scholar
Geological Survey. 1914. Summary of Progress for 1913.Google Scholar
Geikie, (Sir A.) 1915. Summary of Progress for 1914.Google Scholar
Harker, A. 1903. In The Geology of North Arran, South Bute, and the Cumbraes, Mem. Geol. Surv., chapter on the Petrography of the Tertiary Igneous Rocks, pp. 103–27.Google Scholar
Harker, A. 1908. Petrology for Students, 4th ed. (Brunton dyke).Google Scholar
Heslop, (M. K.) and Smythe, (J. A.). 1910. “On the Dyke at Crookdene (Northumberland) and its Relations to the Collywell, Tynemouth, and Morpeth Dykes”: Q.J.G.S., vol. lxvi, pp. 1–18.CrossRefGoogle Scholar
Smellie, (W. R.). 1916. “The Igneous Rocks of Bute”: Trans. Geol. Soc. Glasgow, vol. xv, pt. iii, pp. 334–73.CrossRefGoogle Scholar
Teall, (J. J. H.). 1884. “Petrological Notes on some North of England Dykes”: Q.J.G.S., vol. xl, pp. 209–47.CrossRefGoogle Scholar
Teall, (J. J. H.) 1888. British Petrography, pp. 194–7, 200–7, pls. xii, xiv, xxiv, fig. 1, xxx.Google Scholar
Tyrrell, (G. W.). 1909. “The Classification of the Post-Carboniferous Intrusive Igneous Rocks of the West of Scotland”: Trans. Geol. Soc. Glasgow, vol. xiii, pt. iii, pp. 298–317.CrossRefGoogle Scholar
Tyrrell, (G. W.) 1913. “The Petrology of Arran. 2. Crinanite of Whiting Bay”: Geol. Mag. (V), Vol. X, pp. 305–9.CrossRefGoogle Scholar
Tyrrell, (G. W.) 1916. “The Petrography of Arran. 3. Pitchstone Xenoliths in Basalt Dyke, Dippin”: Geol. Mag. (VI), Vol. III, pp. 193–6.CrossRefGoogle Scholar
Tyrrell, (G. W.) 1917. “The Igneous Geology of the Cumbraes”: Trans. Geol. Soc. Glasgow, vol. xvi, pt. ii.Google Scholar