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Note on the Occurrence of Rocks Allied to Monchiquite in the Island of Fernando Noronha

Published online by Cambridge University Press:  14 March 2018

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

The name of Monehiquite, first applied by Rosenbusch and Hunter (Tscherm. Min. Mitth. XI. 1890, p. 445) to a peculiar group of dyke rocks tound in association with elæolite syenite in Brazil, is rapidly becoming familial" to petrologists through the discovery of similar rocks from various other localities.

The Brazilian Monehiquites were described by Rosenbusch as black to grayish-black rocks, consisting of porphyritic ohvine and pyroxene, with widely varyiug amounts of hornblende and mica, in a glassy base usually crowded with hornblende microliths.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 11 , Issue 52 , May 1897 , pp. 171 - 175
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1897

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References

1 Recently (Journ. Geol. IV. 1896, No. 6) I.. V. Pirsson has brought forward evidence to show that the snpposed glassy base in th, se rocks really consists of analcite,

A correction has been issued for this article:

Errata