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On the Relations between the Gliding Planes and the Solution Planes of Augite
Published online by Cambridge University Press: 14 March 2018
Extract
None of the mineralogical problems of the present day are of greater importance than those which deal with the nature and causes of the modifications which crystallised bodies undergo as a consequence of changes in their environment. It is above all things necessary that we should clearly discriminate in every case between the characters of minerals which are original and essential, and those which are accidental and secondary, and which result from the action of various mechanical and chemical forces upon crystals, subsequently to their formation. No fact is more certain than that crystallized minerals, without losing their identity, may have their chemical composition altered within certain (often very wide) limits; and that, as the result of chemical action or mechanical strains, profound changes may take place in all their optical and other physical properties.
- Type
- Research Article
- Information
- Mineralogical magazine and journal of the Mineralogical Society , Volume 9 , Issue 42 , August 1890 , pp. 192 - 196
- Copyright
- Copyright © The Mineralogical Society of Great Britain and Ireland 1890
References
page 192 note 1 Neues Jahrb. fur Min. &c. 1886, I. p. 185. Ibid. 1889, I. p. 238.
page 193 note 1 Camb. Phil. Tram. Vol. II. p. 166. See also Phillips's Mineralogy, 3rd ed. (1823), p. 69.
page 193 note 2 Am. Journ. Sc. 3rd ser., Vol. IX. (1875) p. 187.
page 193 note 3 Mikrosiopisehe Phynographie der petrographische wichtigen Miner alien, 2nd edition (1885), table xir. fig. 6.
page 193 note 4 Quart. Jour. Geol. Soe. Vol. XL. (1884) pp. 647-8.
page 193 note 5 Quart. Jour. Geol. Soc. Vol. XLI. (1885) p. 367.
page 194 note 1 Report on Rock Specimens collected on Oceanic Islands. Challenger Report Physics and Chemistry, Vol. II. (1889) p. 1.
page 194 note 2 Neues Jahrb. für Min. &c. 1883, II. p. 97.
page 195 note 1 Mineralogical Magazine, Vol. VII. (1886) p. 81.
page 195 note 2 The altered augites of Mingary Castle are figured in Plate XIV. figs. 1 and 2 of Vol. XLVI. Quart. Jour. Geol. Soc. (1890). Professor G. H. Williams has recently called attention to the importance of a similar parting parallel to the basal plane which is found in the hornblende of St. Lawrence County, New York. Am. Jour. Sc. ser. iii. Vol. XXXIX. (1890) p. 352.