RECORD: Darwin, C. R. n.d. [watercoloured geological section diagram for South America]. CUL-DAR39.200. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 8.2022. RN1
NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin.
[200]
No 17)
[proof figure] Porph gneiss Mica slate running NNE & SSW dipping vertically Porph gneiss planes cleavage dipping to ESE (Dike)
Fragment seven yards long & two wide of mica-slate with laminæ dipping vertically in porphyritic gneiss with its laminæ running in same direction, but dipping at small angle to ESE as shown by the arrows.
[South America, p. 143: "No. 22. ─ Fragment of gneiss embedded in another variety of same rock."]
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 25 September, 2022