Hostname: page-component-848d4c4894-ndmmz Total loading time: 0 Render date: 2024-05-16T05:34:57.649Z Has data issue: false hasContentIssue false
  • English
  • Français

I.—Notes on the Geology of Egypt1

Published online by Cambridge University Press:  01 May 2009

J. W. Dawson
J. W. Dawson
Affiliation:
Principal of McGill College, Montreal.
Get access Rights & Permissions [Opens in a new window]

Extract

The mass called Jebel Ahmar or the Red Mountain near Cairo, whose slopes consist of an immense accumulation of quarry rubbish, is composed of hard brown, reddish and white sandstone and siliceous conglomerate. In many parts it has the characters of a perfect quartzite, and appears at first sight extremely unlike a member of the Tertiary series, newer than the comparatively soft and unaltered Eocene beds on which it rests, apparently in a conformable manner, though its dip to the N.E. is somewhat irregular, and apparently affected by false bedding. The induration of the beds seems to be local, and to be connected with certain fumarole-like openings which have probably been outlets of geysers or hot siliceous springs, contemporaneous with the deposition of the sand. Zittel I believe first gave this explanation, which suggested itself to me before noticing it in his memoir.

Type
Original Articles
Information
Geological Magazine , Volume 1 , Issue 9 , September 1884 , pp. 385 - 393
Copyright
Copyright © Cambridge University Press 1884

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

page 385 note 2 Zittel, Lybischen Wuste.

page 385 note 3 Schweiniurth, Proc. German Geol. Soc. 1883.

page 386 note 1 Newbold, Quart. Journ. Geol. Soc. 1848, vol. iv. states the same conclusion, p. 353.Google Scholar

page 386 note 2 Beyrich, Proceedings Royal Academy of Berlin, 1882.

page 386 note 3 Brown, RQuart. Journ. Geol. Soc. iv. Carruthers, Geol. Mag. Vol. VII. p. 306. Unger and Schenk,—Zittel, Lybischen Wuste.Google Scholar

page 386 note 4 Schweinfurth, Proc. German Geol. Soc. 1883.

page 387 note 1 Aus dem Orient, Bui. Geol. Soc. of France vol. xxii. 1868.Google Scholar

page 388 note 1 See Prof. Milne, JGeol. Mag. 1874, pp. 353–362; and review of Zittel's recent work, Geol. Mag. 1884, pp. 172–179.CrossRefGoogle Scholar

page 390 note 1 It has been stated that Nummulites do not occur here; but I was so fortunate as to find specimens of coarse limestone full of them.

page 391 note 1 Bulletin Geol. Soc. of France.

page 391 note 2 As Hudleston has remarked, Bauerman's section of the Zib escarpment exhibits a lower sandstone in connection with which the fossils regarded as Carboniferous occur; while higher in the series there are other sandstones associated with calcareous beds holding undoubted Cretaceous lossils. Geology of Palestine, Proceedings Geol. Assoc. vol. viii.

page 392 note 1 Quart. Journal Geol. Soc. 1848 vol. iv. pp. 349–357.Google Scholar

page 392 note 2 Acadian Geology.

page 392 note 3 Tate, Quart. Journ. Geol. Soc. 1871, vol. 27, p. 404; Hudleston, Address to Geologists' Assoc. vol. viii. 1883, pp. 1–53.CrossRefGoogle Scholar