RECORD: Darwin, C. R. [1832?]. [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, corrections 2024. RN2

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)

[on sketch:] Porph gneiss Mica slate running NNE & SSW dipping vertically Junction not well defined. Porph gneiss planes cleavage dipping to ESE

[below sketch:]  (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: Botofogo Bay "No. 22. ─ Fragment of gneiss embedded in another variety of same rock."]


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

File last updated 4 January, 2025