The Complete Work of Charles Darwin Online

RECORD: Darwin, C. R. n.d. Upper true chalks d' Orbigny. CUL-DAR43.1.60-61. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 10.2023. 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-DAR43.1 contains Notes by Orbigny, Sowerby & Forbes on Darwin's shells.

Darwin, C. R. 1846. Geological observations on South America. Being the third part of the geology of the voyage of the Beagle, under the command of Capt. Fitzroy, R.N. during the years 1832 to 1836. F273

[60]

Upper true chalks d' Orbigny

Craie chloritique = Upper Greensand

gault gault

Neocomian =

{Lower Greensand Forbes

{Wealden d'orbigny

Forbes thinks Wealden not cretaceous

[61]

Coquimbo (Cretaceo-oolite)

Evidence of cretaceous consists of — Gryphæa, Ostrea Hippurites — / Spirifer & 2 Terbratula resemble oolite forms

Copiapo

Gryphæa & Perna & 2 Terbratula are oolite forms — so many evidence

Pecten & Turritella

Guasco

same as Copiapo

Suspects Central Cordillera— lower Chalk

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