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Notes on a Biotite-Cyanite-Cordierite-rock from the Upper Satlej Valley, N.W. Himalayas

Published online by Cambridge University Press:  14 March 2018

C. A. McMahon
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Extract

Some years ago I found in the bed of the Satlej at Wangtu, in the N.W. Himalayas, about 80 miles, as the crow flies, north-east of Simla, a boulder of the rock described in the following pages, It is composed of biotite, cyanite and cordierite, with apatite and rutile as accessory minerals.

The specimen has a specific gravity of 2.92. Its structure is holocrystalline, and its minerals show no trace of parallelism in their orientation. It is, I think, a product of contact metamorphism.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 11 , Issue 51 , October 1896 , pp. 141 - 145
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1896

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References

page 141 note 1 Some fine specimens of eyanite found in granitoid gneiss a mile or two above Wangtu were exhibited when the paper was read.

page 144 note 1 l. c. p. 351.

page 144 note 2 Lord Kelvin quoting Carl Barus, Nature, Vol. LI. p. 439.

page 145 note 1 Professor Sollas relying on Dr. Joly, Nature, Vol. LI. p. 534.