RECORD: Darwin, C. R. 1851.10. Lyell tells me that under the Potsdam Sandstone with footsteps there are unconformable - ripple-marked - non-metamorphosed strata. CUL-DAR205.9.241. 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: The brown crayon number '22' indicates that this document was filed by Darwin in his portfolio for the subject of Palaeontology: extinction.
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].
[241]
Oct /51/ Lyell tells me that under the Potsdam Sandstone with footsteps there are unconformable - ripple-marked - non-metamorphosed strata.
Some = new Fish in middle Silurian described at Cincinnati American Association.
Study Purbeck beds - lapse of time most, most wonderful, with no evidence in mineralogical changes
22
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 25 September, 2022