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The mineralogy of some Upper Chalk samples from the Arundel area, Sussex

Published online by Cambridge University Press:  09 July 2018

A. H. Weir
Affiliation:
Rothamsted Experimental Station, Harpenden, Herts
J. A. Catt
Affiliation:
Rothamsted Experimental Station, Harpenden, Herts

Abstract

Seven samples, representative of all zones of the Upper Chalk in the Arundel area of Sussex, were treated with acetic acid and the residues analysed to determine their mechanical and mineralogical compositions. The sand and silt fractions of the residues consist mainly of flint and opaline silica, collophane, limonite, and quartz, and the clay fractions consist of montmorillonite, mica, quartz, and apatite. Authigenic apatite and quartz occur in the clay and silt and authigenic alkali feldspar in the silt. The montmorillonite may also be authigenic.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1965

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