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IV.—On the Age of the Gebel Ahmar Sands and Sandstone, the Petrified Forest, and the Associated Lavas between Cairo and Suez
Published online by Cambridge University Press: 01 May 2009
Extract
The geological age of these beds has been the subject of much speculation by various geologists. In 1845 Orlebar claimed to have found the Gebel Ahmar Sandstone at No. 3 Station on the Old Post Road to Suez, overlying Miocene beds containing Scutella Zitteli. O. Fraas in 1867 imagined he could trace a gradual passage between the Upper Moqattam and these beds, and concluded, therefore, that they were of marine origin and Lower Oligocene age, as they had undergone the same general earth-movements as the Eocene beds.
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References
page 58 note 1 Lynch: “Armenia,” vol. ii, p. 229.
page 58 note 2 “ Some observations on the Geology of the District between Cairo and Suez ”: Journ. Roy. Asiatic Soc., 1845.
page 58 note 3 “Aus dem Orient,” 1867, pp. 157–8.
page 58 note 4 “ Geol. Schichtengliederuug d. Mokattam”: Zeitschr. d. Deutsoh. Geol. Gesells., 1883, p. 719 et seq.
page 59 note 1 Three lectures on the Geology of Egypt, 1891.
page 59 note 2 Bull, de l'lnstitut Egyptien, 1893, pp. 393 et seq.
page 59 note 3 “Etude géol. sur le Gebel Ahmar ” (l'lnstitut Egyptien, December, 1891); and “L'age des Forêts pétrifiées des déserts d'Egypte” (Bull. Soc. Khéd. Géographie, sér. v, No. 2, 1898).
page 59 note 4 “Das Oligoeän”: Zeitschr. d. geolog. Gesells., 1909, pp. 477 and 478.
page 61 note 1 Loc. cit.
page 61 note 2 Geol. Mag., 1904, pp. 603–608.
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