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Sandy Gypsum Crystals from Berbera, British Somaliland

Published online by Cambridge University Press:  01 May 2009

W. A. Macfadyen
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Abstract

Gypsum crystals containing 62 per cent by volume of sand are described from a late Raised Beach, where they were found by digging shallow coastal wells. An account is given of their crystallographic form and of the circumstances in which they have been produced. Gypsum has not only been deposited in the voids of the sand but has even moved the individual grains apart. A review is given of earlier records of sandy gypsum crystals, sometimes called “desert roses”, and comparison is made.

Type
Articles
Information
Geological Magazine , Volume 87 , Issue 6 , December 1950 , pp. 409 - 420
Copyright
Copyright © Cambridge University Press 1950

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References

LIST OF WORKS TO WHICH REFERENCE IS MADE

Deicha, G., 1943. Genèse et facies du gypse. Bull. Soc. Franc. Minér., lxvi, 153–160.Google Scholar
Delkeskamp, R., 1903. Über die Krystallisationsfähigkeit von Kalkspat, Schwerspat, und Gyps bei ungewöhnlich grosser Menge eingeschlossenen Quartzsandes. Zeit. f. Naturwiss. (Stuttgart), 1902 (1903), lxxv, 185–208.Google Scholar
Doss, B., 1897. Ueber sandhaltige Gypskristalle vom Bogdo-Berge in der Astrachan'schen Steppe. Zeit. deutsch. geol. Ges., xlix, 143–151.Google Scholar
Eremyeev, P. V. (= Jeremejeff, Ieremief), 1895. Sur les concrétions de cristaux de gypse, trouvé en Transcaspie, dans un “barkhane” Bull. Ac. Imp. Sci. St. Petersbourg, V ser., iii, lxii–lxiii. (In Russian, no summary.)Google Scholar
Garrido, J., 1945. Sur des cristaux de gypse présentant des “fantomes” de croissance. Bol. Soc. Geol. Portugal, iv, 213–4.Google Scholar
Kaiser, E., 1926. Die Diamantenwüste Südwest-Afrikas, 4to, Berlin, ii, 129–130.Google Scholar
Kaiser, and Neumaier, F., 1932. Sand-Steinsalz-Kristallskelette aus der Namib Südwestafrikas. Centralbl. Min. Geol. Pal., 1932 A, 177–188.Google Scholar
Katzer, F., 1891. Beiträge zur Mineralogie Böhmens. 8.—Gyps von Alt-Straschnitz und Libochwitz. Tschermak's Min. Pet. Mitth., N.F., xii, 423–8.Google Scholar
Lacroix, A., 1897. Le Gypse de Paris et les minéraux qui l'accompagnent. Nouv. Arch. Mus. d'Hist. Nat. (Paris), ser. 3, ix, 201–294 (see pp. 209–210).Google Scholar
Lacroix, A., 1898. Les formes du gypse des environs de Paris. Bull. Soc. franc. Minér., xxi, 39–43.Google Scholar
Lacroix, A., 1901. Minéralogie de la France et de ses Colonies, iii, 517.Google Scholar
Lacroix, A., 1910. Minéralogie de la France et de ses Colonies, iv, 187.Google Scholar
Maschke, O., and Vater, H., 1900. Mikroskopische Studien über die Krystallisation des Gypses. Zeit. Kryst. Min., xxxiii, 57–71.Google Scholar
Pöhlmann, R., 1892. Mineralogische Mittheilungen. Gypskrystalle, reich an Beimengungen eines feinen Sandes, von Carcote in Bolivia. Verh, deutsch. Wiss. Ver. Santiago (Chile), ii, 238–9.Google Scholar
Samoilova, Y. V. (= Samojloff), 1913. Gypses poïkilitiques d'Islam-Kuju (province Transcaspienne). Bull. Ac. Sci. St. Petersbourg, 6 ser., vii, 783–7. (In Russian, no summary.)Google Scholar
Vatonne, F., 1863. Études sur les terrains et sur les eaux des pays traversés par la mission, 203–313. In M. M. Mircher: Mission de Ghadamès, 8vo, Alger.Google Scholar
Walther, J., 1898. (No title.) Zeit. deutsch. geol. Ges., Bd. 50, Verhandl. der Ges., pp. 2–3.Google Scholar
Walther, J., 1900. Das Gesetz der Wüstenbildung in Gegenwart und Vorzeit, 129–130, 8vo, Berlin.Google Scholar
Whitlock, H. P., 1930. Desert Roses. Natural History (New York), 1929 (1930), xxx, 421–5.Google Scholar
Wulf, H., 1887. Beitrag zur Petrographie des Hererolandes in Südwest-Afrika. Tschermak's Min. Pet. Mitth., N.F., viii, 193–238. (See p. 237.)CrossRefGoogle Scholar