Published online by Cambridge University Press: 14 March 2018
Sepiolite has been identified in the Keuper Marl at a Midlands locality by X-ray diffraction data, electron microscopy, differential thermal analysis, and chemical analysis. It has been calculated that a sample representing 30 ft. thickness of clay may contain as much as 39 % sepiolite. Apart from sepiolite, the Keuper Marl in the area examined consists mainly of mica, quartz, calcite, and ferric oxide.
page 330 note 1 Kerr, P. F., Kulp, J. L., and Hamilton, P. K., Amer. Petroleum Inst. Res. Proj., 49, 1949, Prelim. Rep. No. 3.Google Scholar
page 331 note 1 Brindley, G. W., X-ray Identification and Structures of Clay Minerals London, 1951, chap. 8.Google Scholar
page 331 note 2 Millot, G., Géol. appl. et Production Minière, 1949, Tome 2, Nos. 2, 3, 4.Google Scholar
page 332 note 1 Wills, L. J., Palaeogeographical Atlas of the British Isles and Adjacent Parts of Europe, 1951. London: Blaekie and Sons.Google Scholar
page 332 note 2 Honeyborne, D. B., Clay Min. Bull., 1951, vol. 1, p. 150.CrossRefGoogle Scholar
page 332 note 3 Stephen, I. and MacEwan, D. M. C., ibid. p. 157.Google Scholar