RECORD: Darwin, C. R. Geological diary: Rat Island / The Mount. (7-8.1832) CUL-DAR34.1 Transcribed by Kees Rookmaaker, edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Kees Rookmaaker, corrected and edited by John van Wyhe 10.2011. RN1
NOTE: This document, part of the largest scientific document composed by Darwin during the voyage of the Beagle, is written mostly in ink. See the Beagle diary pp. 199, 212.
Editorial symbols used in the transcription:
[some text] 'some text' is an editorial insertion
[some text] 'some text' is the conjectured reading of an ambiguous word or passage
[some text] 'some text' is a description of a word or passage that cannot be transcribed
< > word(s) destroyed
<some text> 'some text' is a description of a destroyed word or passage
Text in small red font is a hyperlink or notes added by the editors.
Reproduced with the permission of the Syndics of Cambridge University Library and William Huxley Darwin.
Rat island. 27th
Mica slate. — coarse granular
beds & cleavage running E by N
plans of fracture dipping to E SE (differing in contrary vary from schist) ∠ 12°. — there not regular even dipping SSW
containing in imbedded portions chloritic schist. these are penetrated by veins of quartz & mica. from which
penetrated smaller much twisted vary most of granular quartz are sent off so that the whole schist is this entangled. (specimen 649). — I may observe that the schist has same planes of cleavage & fracture as mica slate, so that it is same formation. —
The Mount 28th —
Return to homepage
Citation: John van Wyhe, editor. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 2 July, 2012