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Preliminary Note on the Rocks of Darfur

Published online by Cambridge University Press:  01 May 2009

Captain Hubert Lynes  and
W. Campbell Smith
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Extract

IN the course of a journey from El Obeid to Jebel Marra, in Darfur, Captain Hubert Lynes collected a number of the rocks from the volcano of Dereiba and from various other points on the route, shown in the map (Fig. 1). The rocks of this area have not been described hitherto. The following notes give a brief description of the nature of the country, with petrological details of the rocks collected.

Type
Original Articles
Information
Geological Magazine , Volume 58 , Issue 5 , May 1921 , pp. 206 - 215
Copyright
Copyright © Cambridge University Press 1921

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References

page 206 note 1 Linck, G., “Beiträge zur Geologie und Petrographie von Kordofan”: Neues Jahrbuch für Min., etc., B.B. xvii, 1903, pp. 391–463.Google Scholar

page 206 note 2 The numbers in brackets are the serial numbers of the specimens as recorded in the rock-registers of the Department of Minerals, British Museum (Natural History).

page 207 note 1 Loc. cit., p. 407.Google Scholar

page 208 note 1 Jean, Tilho, Geogr. Journ., vol. lvi, 1920, p. 93.Google Scholar

page 210 note 1 Hobbs, H. F. C., “Notes on Jebel Marra, Darfur”: Geogr. Journ., vol. lii, 1918, pp. 357–63. Capt. Hobbs' altitudes, for reasons which he himself explains, are inaccurate. Capt. Lynes, who considers his observations correct to within 200 feet, climbed a 9,500 ft. peak (6,000 feet in Hobbs' map, loc. cit., p. 362), and judged several peaks viewed thence to be up to 10,000 feet or over.CrossRefGoogle Scholar

page 211 note 1 Prior, G. T., Min. Mag., vol. xiii, 1903, p. 342.Google Scholar

page 211 note 2 Loc. cit., p. 241.Google Scholar

page 212 note 1 Prior, G. T., Min. Mag., vol. xii, 1900, p. 267.Google Scholar

page 213 note 1 Prior, G. T., “National Antarctic Expedition, 1901–1904”: Nat. Hist., vol. i:, 1907, p. 106.Google Scholar

page 213 note 2 Jensen, H. I., “British Antarctic Expedition, 1907–1909”: Geology, vol. ii, 1916, pp. 107–9.Google Scholar

page 213 note 3 Harker, A., “The Tertiary Igneous Rocks of Skye”: Mem. Geol. Surv. U.K., 1904, p. 264.Google Scholar

page 214 note 1 Thomas, H. H., “The Skomer Volcanic Series”: Quart. Journ. Geol. Soc., vol. lxvii, 1911, p. 197, fig. 9b.Google Scholar

page 214 note 2 Lacroix, A., C.R. Acad. Sci. Paris, vol. clxix, 1919, pp. 401–7.Google Scholar

page 214 note 3 Ibid., p. 404.

page 214 note 4 Lacroix, A., C.R. Acad. Sci. Paris, vol. clxviii, 1919, pp. 1237–40, and vol. clxix, p. 403.Google Scholar