A Note on Pyrosmalite from Nant Francon, North Wales

P. E. Brown
Department of Geology, University of Sheffield

Summary: The presence of pyrosmalite is recorded in a metasomatized slate that is in contact with intrusive rhyolite in the Nant Francon area of North Wales.

Mineralogical Magazine; September 1959 v. 32; no. 246; p. 242-244; DOI: 10.1180/minmag.1959.032.246.06
© 1959, The Mineralogical Society
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