From Daniel Mackintosh 15 January 1880
36 Whitford Road | Tranmere, | Birkenhead,
15th Jan. 1880
Dear Sir,
I send a syllabus of a paper I am about forwarding to the Geological Society.1 I can easily understand how the retreat of the sea may have left the terraces of Patagonia,2 while in this neighbourhood the sinking of the land was the cause of the submergence. But I have not made any positive assertions on the subject.
I find from your paper in the Phil. Magazine that you were the first to notice the proofs of the violent stranding of floating ice, which I cannot but regard as the most remarkable of all the Moel Tryfan phenomena.3 I have made use of the term “violent impact” &c in my paper.
Clay above all—parcels of clay rolled up in sand,—& parcels of slate chips rolled up in sand.
With many thanks for the letters with which you have honoured me,4 | I am, Dear Sir, | Yours very truly, | D Mackintosh
Footnotes
Bibliography
‘Ancient glaciers of Caernarvonshire’: Notes on the effects produced by the ancient glaciers of Caernarvonshire, and on the boulders transported by floating ice. By Charles Darwin. Philosophical Magazine 3d ser. 21 (1842): 180–8. [Shorter publications, pp. 140–7.]
‘Distribution of the erratic boulders’: On the distribution of the erratic boulders and on the contemporaneous unstratified deposits of South America. By Charles Darwin. [Read 5 May 1841.] Transactions of the Geological Society of London 2d ser. 6 (1841–2): 415–31. [Shorter publications, pp. 147–62. For read date, see Proceedings of the Geological Society of London 3 (1838–42): 425.]
Mackintosh, Daniel. 1879. Results of a systematic survey, in 1878, of the directions and limits of dispersion, mode of occurrence, and relation to drift-deposits of the erratic blocks or boulders of the West of England and east of Wales, including a revision of many years’ previous observations. [Read 26 March 1879.] Quarterly Journal of the Geological Society of London 35: 425–55.
Mackintosh, Daniel. 1881. On the precise mode of accumulation and derivation of the Moel-Tryfan shelly deposits; on the discovery of similar high-level deposits along the eastern slopes of the Welsh mountains; and on the existence of drift-zones, showing probable variations in the rate of submergence. [Read 27 April 1881.] Quarterly Journal of the Geological Society of London 37: 351–69.
Summary
The violent stranding of floating ice as first mentioned in CD’s article ["Ancient glaciers of Caernarvonshire", Collected papers 1: 163–71] is the most remarkable of the Moel Tryfan phenomena.
Letter details
- Letter no.
- DCP-LETT-12426
- From
- Daniel Mackintosh
- To
- Charles Robert Darwin
- Sent from
- Tranmere
- Source of text
- DAR 171: 9
- Physical description
- ALS 2pp
Please cite as
Darwin Correspondence Project, “Letter no. 12426,” accessed on 23 April 2024, https://www.darwinproject.ac.uk/letter/?docId=letters/DCP-LETT-12426.xml
