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To Daniel Mackintosh 13 November 1880
Summary
Comments on DM’s ["The Moel-Tryfan shelly deposits", Q. J. Geol. Soc. Lond. 37 (1881): 351–69].
Comments on cause of earthquakes.
Believes formation of ice lowered level of sea.
| Author: | Charles Robert Darwin |
| Addressee: | Daniel Mackintosh |
| Date: | 13 Nov 1880 |
| Classmark: | DAR 146: 334 |
| Letter no: | DCP-LETT-12812 |
From Daniel Mackintosh 11 November 1880
Summary
Has found three zones of stones in the Welsh and Pennine mountains which he accounts for by elevation and subsidence. Does CD think that these movements in historical times have been caused by earthquakes or by slow and gradual movements?
| Author: | Daniel Mackintosh |
| Addressee: | Charles Robert Darwin |
| Date: | 11 Nov 1880 |
| Classmark: | DAR 171: 10 |
| Letter no: | DCP-LETT-12808 |
From Daniel Mackintosh 21 November 1880
Summary
The use of earthquakes as a geological cause in his previous letter was careless.
Shelly beach deposits over considerable distance from Ireland to Scotland seem better explained by high sea-level than low land.
Only CD seems to have reported shattered rocks under the Moel Tryfan drift.
| Author: | Daniel Mackintosh |
| Addressee: | Charles Robert Darwin |
| Date: | 21 Nov 1880 |
| Classmark: | DAR 171: 11 |
| Letter no: | DCP-LETT-12836 |
Document type
| letter | (3) |
Author
| Mackintosh, Daniel | (2) |
| Darwin, C. R. | (1) |
