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From Charles Lyell 24 November 1860
Summary
CL has calculated that elevation and subsidence of certain formations in Sweden and Norway take place at the rate of 2 1/2 feet per century. He now proposes to estimate the age of a bed by including a conjecture that pauses occur in the oscillations in the ratio of 4 periods of stasis to one of movement. Applying this formula to Scotland, the last subsidence and re-elevation would be 590,000 years and the age of the beds with human implements would be 20,000 years.
| Author: | Charles Lyell, 1st baronet |
| Addressee: | Charles Robert Darwin |
| Date: | 24 Nov 1860 |
| Classmark: | The University of Edinburgh Centre for Research Collections (Lyell collection Coll-203/A3/7: 40–8) |
| Letter no: | DCP-LETT-2996A |
Document type
| letter | (1) |
Correspondent
| Darwin, C. R. | (1) |
| Lyell, Charles |
