RECORD: Darwin, C. R. 1845.12. When Agassiz, d'Orbigny & Pictet say no species common to two Formations, I must enquire, what they mean by Formation. CUL-DAR205.9.205. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 9.2021. 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-DAR205.9 contains notes on palaeontology and geology [regarding theory of evolution].
[205]
Dec /45/
When Agassiz, d'Orbigny & Pictet say no species common to two Formations, I must enquire, what they mean by Formation
Is all Tertiary one formation? Lymeriei fact of Nummulite have a percentage of Eocene & Cretaceous fossils very important as showing slow coming in & going out common to Secondary Epochs.
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 26 July, 2023