gsminmag Clay Minerals Clay Minerals 0009-8558 Mineralogical Society 10.1180/minmag.1953.030.222.06 On the Occurrence of Nacrite at Shap, Westmorland Firman R. J. B.Sc., F.G.S. Department of Geology, Durham Colleges in the University of Durham.

Communicated by the General Secretary; taken as read June 11, 1953.

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