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A Note on Cone-in-Cone Structure

Published online by Cambridge University Press:  14 March 2018

T. G. Bonney
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Extract

The structure called cone-in-cone attracted my attention when I was working at certain forms of jointing and spherulitic structures in rocks, and has been studied in a desultoiy fashion ever since. Moreover, the Museum of University College possesses some good specimens of cone in-cone obtained by the late Prof. Morris, and I received a present of others, which had been used by Mr. W. S. Gresley for his suggestive paper when he left England for America. But though I formed some general conclusions on the subject, I abstained from writing, because I felt doubt concerning one point of importance, and had never seen a good example of cone-in-cone in the field.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 11 , Issue 49 , April 1895 , pp. 24 - 27
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1895

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References

page 24 note 1 Quart. Jour. Geol. Soc., XXXII. (1876), p. 140. Geol. Mag., 1877, p. 499.

page 24 note 2 Geol. Mag., 1887, p. 17. A very interesting paper by the same author appearcd in the Quart. Jour. Geol. Soc. for Nov. 1894, p. 731, after this note had been sent to the Secretary of the Mineralngical Society. It brings forward additional evidence in support of the "crystsllisation" theory, and practically anticipates some part of my note. But I leave it as written, since the conclusions were forms0 independently.

page 24 note 3 Min. Mag. X. p. 186.

page 24 note 4 Brit. Assov. Rep., 1859, pt. 2, p. 124.

page 24 note 5 Presidential Address to the Geological Society, 1885. Quart. Jour. XLI. Proc. p. 95.

page 25 note 1 Quart. Jour. Geol. Soc. XXVII, (1871), p. 220.

page 25 note 2 In the specimens from the Coal Measures which I have examined, the mineral is very often chalybite.

page 26 note 2 They are indicated in the illustrations to Prof. Cole's paper, Figs. 1-3, pp, 140-141.