Replacements Involving Early Carnallite in the Potassium-Bearing Evaporites of Yorkshire

F. H. Stewart
Department of Geology, Science Laboratories, South Road, Durham

Summary: Evidence from four recent boreholes in the Yorkshire potash field suggests that carnallite was an important original constituent of the Middle Evaporite Bed, and that much of the sylvine of the potash zone is of secondary origin.

The carnallitie rocks have been affected by complex replacements, an earlier series involving sylvine, halite, and anhydrite, and a later series involving rinneite, halite, sylvine, and carnallite.

Mineralogical Magazine; June 1956 v. 31; no. 233; p. 127-135; DOI: 10.1180/minmag.1956.031.233.02
© 1956, The Mineralogical Society
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