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IV.—On the Flexibility of Rooks; with Speoial Reference to the Flexible Limestone of Durham

Published online by Cambridge University Press:  01 May 2009

George W. Card
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Extract

The existence of rocks possessing, when the laminæ are not too thick, the property of flexibility has long been known. Upon flexible sandstone (“Itacolumite”) a great deal has been written at different times, and of late years important work has been done which renders it necessary to greatly modify the opinions formerly held with regard to this rock. Notwithstanding the interest which, is attached to the subject, it is one very much neglected by our textbooks, the British, either ignoring it altogether, or treating it with the utmost brevity, the German, while sometimes referring to it at considerable length, do not do more than enunciate the old views. To Prof. Judd—who has kindly aided me with advice, and by affording facilities for preparing this paper—I owe the suggestion that it would therefore be useful to give a résumé of the present state of our knowledge upon the flexibility of rocks in general.

Type
Original Articles
Information
Geological Magazine , Volume 9 , Issue 3 , March 1892 , pp. 117 - 124
Copyright
Copyright © Cambridge University Press 1892

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References

page 117 note 1 Judd, Memoirs of Geol. Surrey, Geology of Rutland, pp. 117–138; Hudleston, , Proc. Geol. Assoc. vol. xi. p. 104.Google Scholar

page 117 note 2 Cole and Jennings, Q.J.G.S. vol. xlv. (1889) p. 426.Google Scholar

page 117 note 3 p. 219.

page 118 note 1 Trans. Geol. Soc. ser. ii. vol. iii. 1835, p. 87.Google Scholar

page 118 note 2 Text-book of Descriptive Mineralogy, Bauerman, H., p. 353.Google Scholar

page 118 note 3 However it may be at Marsden, this is certainly not the case at Sunderland. After having been kept in a dry place for several months, the specimens from the latter locality have undergone no loss of flexibility whatever.

page 118 note 4 Sedgwick, op. cit. p. 86.Google Scholar

page 119 note 1 Sedgwick, op. tit.

page 119 note 2 See Woodcut, Fig. A., p. 123, infra.Google Scholar

page 120 note 1 See Woodcut, Fig. B., p. 123, infra:Google Scholar

page 120 note 2 Third Report on the Geognostio Survey of South Carolina, 1848, p. 85, et. seq.

page 121 note 1 Am. Journ. Sci. xxviii. 1884, p. 205.Google Scholar

page 121 note 2 Rec. Geol. Surv. India, vol. xxii. pt. 1, 1889, p. 53.Google Scholar

page 121 note 3 Lehrbuch der Petrographie, 1886, Bd. 11, p. 482.Google Scholar

page 121 note 4 On Flexible Sandstone or Itacolumite, Oldham, R. D., A.R.S.M., Records Geol. Surv. India, vol. xxii. pr. 1, 1889.Google Scholar

page 121 note 5 Ueber “Gelenksandstein” aus der Umgegend von Delhi Mügge, O., Neuen Jahrbuch, Bd. i. 1887.Google Scholar

page 121 note 6 On the Flexibility of Itacolumite, Derby, Orville A., Am. Journ. Soi. vol. xxviii. 1884.Google Scholar

page 122 note 1 The italics are mine.

page 123 note 1 p. 54.