Riebeckite-rhyolite from Northern Kordofan, Sudan1

W. Campbell Smith
Assistant in the Mineral Department of the British Museum
1Published by permission of the Trustees of the British Museum.

Mineralogical Magazine; May 1920 v. 19; no. 89; p. 48-50; DOI: 10.1180/minmag.1920.019.89.05
© 1920, The Mineralogical Society
Mineralogical Society (www.minersoc.org)