Darwin, C. R. I may also remark that generally where the cleavage of the Mica Slates is not well developed. CUL-DAR42.77 Transcribed by John van Wyhe (<em>Darwin Online</em>, http://darwin-online.org.uk/)

RECORD: Darwin, C. R. n.d. I may also remark that generally where the cleavage of the Mica Slates is not well developed. CUL-DAR42.77. . Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by John van Wyhe, corrections by Kees Rookmaaker 5.2011. RN1

NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with the permission of the Syndics of Cambridge University Library and William Huxley Darwin. The volume CUL-DAR42 contains notes for Darwin's book South America (1846).

[77]

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I may also remark, that generally where the cleavage of the Mica Slates is not well developed, the angle is small. —

Tres Montes [twisted] where dykes

[77v]

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(b) Perhaps in several cases the presence of <remainder excised>

to be parallel) in these Slates has determine the lines of dyke. — But we [remainder excised]

of up burst must have been more E & W than N & S. — In one case the mechanical yielding of the laminae, has determined it. —

Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)