RECORD: Darwin, C. R. [1835]. hand-drawn geographical section [section at Pluclaro, east of Coquimbo]. CUL-DAR44.21. (John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed and edited by John van Wyhe 2024. With thanks to Gordon Chancellor. 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. The volume CUL-DAR44 contains maps of South America, plans, diagrams and geological sections etc. drawn by Darwin.
Excised from CUL-DAR36.581. Watercoloured section: West to East section through an anticline of purple rocks above and below a bed of limestone, dislocated by an east-dipping fault. Based on Coquimbo notebook, p. 110. In CD's ink annotations, presumably added in the mid-1840s he conjectures that the rocks are of Lower Cretaceous age. Watermarked 'RM [1831 1]' 20x11cm.
See the introduction to the Geological Diary by Gordon Chancellor.
[21]
[geological section]
[in pencil:] Purple rock | Line of fault | Purple R | 150 ft wide
[in ink:] (lower Cretaceous? Limestone & fossiliferous?) | Red calcareous sandstone | Calcareous argillic stone like hone | -1 with silicified wood(?) | Speudo sand honestone | Green argillaceous concretionary sediment ? | [illeg] | Feldspathic porphy Traces of porph
[20v]
P: 97
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 8 February, 2026