Sepiolite at a Locality in the Keuper Marl of the Midlands

P. S. Keeling
The British Ceramic Research Association, Queen's Road, Penkhull, Stoke-on-Trent, Staffordshire

Summary: 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.

Mineralogical Magazine; December 1956 v. 31; no. 235; p. 328-332; DOI: 10.1180/minmag.1956.031.235.08
© 1956, The Mineralogical Society
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