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Four “Felstone” Intrusions in Central Berwickshire

  • John Irving (a1)
Extract

The three masses of Dirrington Great Law, Dirrington Little Law, and Blacksmill Hill consist of riebeckite felsite, closely allied to the rock of the neighbouring Eildon Hills and most probably contemporaneous with it, i.e. they are of a Carboniferous age. They may represent the denuded remains of a laccolith which has been intruded into upper Old Red Sandstone conglomerates. The fourth mass forming Kyleshill is an orthophyre, with which is associated an andesite. The relations of these two rocks are obscure, and they may, or may not be, of the same age as the other three masses.

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page 529 note 1 The Geology of East Lothian,” Memoir Geol. Survey, 1866, p. 26.

page 529 note 2 The Geology of East Lothian,” Memoir Geol. Survey, 1910, p. 23.

page 529 note 3 Ancient Volcanoes of Great Britain, vol. i, pp. 290–1.

page 530 note 1 A Geological Survey of Berwickshire,” Trans. of the Highland and Agricultural Soc. of Scotland, 1837, vol. xi, pp. 171253.

page 535 note 1 The Geology of Edinburgh Dist.,” Mem. Geol. Survey, pp. 3741.

page 535 note 2 McRobert, Rachael Workman, “Acid and Intermediate Intrusions and Associated Ash Necks in the Neighbourhood of Melrose,” Quart. Journal Geol. Soc., vol. lxx, 1914, pp. 303–14, esp. p. 308.

page 538 note 1 The Geol. of Edinburgh and District,” Memoir Geol. Survey of Scotland, 1910, pp. 3741.

page 538 note 2 Op. cit., 308–9.

page 538 note 3 Op. cit., p. 291.

page 539 note 1 Op. cit., pp. 307–8.

page 539 note 2 Mem. Geol. Survey Edinburgh District, 1910, p. 39.

page 540 note 1 Phillips, F. Coles, Geol. Mag., Vol. LXIII, 1926, p. 75.

page 540 note 2 (Described) Teall, J. J., Mineralogical Magazine, vol. ix, pp. 219–22.

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Geological Magazine
  • ISSN: 0016-7568
  • EISSN: 1469-5081
  • URL: /core/journals/geological-magazine
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