Zeolites of the Clinoptilolite-heulandite Type in Sediments of South-east England

G. Brown, J. A. Catt and A. H. Weir
Pedology Department, Rothamsted Experimental Station, Harpenden, Herts.

Summary: Clinoptilolite-heulandite is reported from Jurassic, Cretaceous, and Palaeocene sediments in south-east England. It occurs mainly in 1–20 μm size fractions, and is associated with abundant montmorillonite and often also with glauconite and amorphous silica or low-temperature disordered cristobalite-tridymite. Its mode of occurrence and the associated minerals suggest an authigenic origin, but there is no evidence that the source material was volcanic.

Mineralogical Magazine; December 1969 v. 37; no. 288; p. 480-488; DOI: 10.1180/minmag.1969.037.288.08
© 1969, The Mineralogical Society
Mineralogical Society (www.minersoc.org)