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Riebeckite in Trachytic Rocks from Abyssinia

Published online by Cambridge University Press:  14 March 2018

G. T. Prior*
Affiliation:
Mineral Department of the British Museum

Extract

It is now ten years since Sauer first described under the name of riebeckite a new species of blue hornblende in the granite of Socotra.

Since that time its occurrence in the British Isles has been noted in the " felsite " of Mynydd Mawr, N. Wales ; in the " microgranite " of Ailsa Craig, Firth of Clyde; in glacial deposits from the Isle of Man; Moel Tryfaen, N. Wales; Greystones, Co. Wicklow; and Greenore, Carlingford; in granophyre from Meall Dearg, Skye; and in felsite from Middle Eildon, Roxburghshire.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1899

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References

page 92 note 1 "Ueber Riebeckite, ein neues Glied der Hornblendegruppe." Zdts. deutsch, geol. Ges. XL. (1888), p. 138.

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page 95 note 1 Extinction on c(001) 0°--2° on b 010) 9°-12° strong sodium flame.

A correction has been issued for this article: