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Published online by Cambridge University Press: 14 March 2018
Rock-gypsum occurs as extensive deposits of considerable economic importance in the neighbourhood of Nottingham. The mode of occurrence and origin have been studied by several geologists, to whose work references were given in a recent communication to this Society. I Investigations have proceeded chiefly on field lines and microscopic examination has been somewhat neglected, except with respect to the contact relations of gypsum and anhydrite. Nevertheless, examination of thin slices from specimens collected in different parts of the district yields information of considerable interest and. it may be, of importance.
page 196 note 1 Richardson, W. A., The fibrous gypsum of Nottinghamshire. Min. Mag., 1920, vol. 19, p. 77 Google Scholar.
page 196 note 1 Mem. Geol. Surv., Min. Resources Great Britain, 1915, vol. 8, p. 9.
page 200 note 1 Smith, B., Quart. Journ. Geol. Soc., 1919, vol. 74, pp. 195–199 Google Scholar.
page 204 note 1 Lacroix, A., Nouv. Archiv. Mus. d'Hist. Nat. Paris, 1897, ser. 8, vol. 9, p. 227 Google Scholar. Plate X, fig. 1 (cf. also fig. 5).