To Charles Lyell 10 January [1855]
Summary
Discusses views of Daniel Sharpe on foliation and cleavage. Recalls his own previous discussion [in South America].
| Author: | Charles Robert Darwin |
| Addressee: | Charles Lyell, 1st baronet |
| Date: | 10 Jan [1855] |
| Classmark: | American Philosophical Society (Mss.B.D25.110) |
| Letter no: | DCP-LETT-1626 |
To Charles Lyell 14 January [1855]
Summary
Has found a house on Baker Street to take for a month.
Mentions Daniel Sharpe’s study of the Grampians.
Association of various metamorphic rocks and relationship of their foliation to their dip and strike. Discusses foliation of schists and its origin. Comments on fluidity of gneiss and schists.
| Author: | Charles Robert Darwin |
| Addressee: | Charles Lyell, 1st baronet |
| Date: | 14 Jan [1855] |
| Classmark: | American Philosophical Society (Mss.B.D25.111) |
| Letter no: | DCP-LETT-1630 |
To Charles Lyell [21 January – 11 February 1855]
Summary
Relationship of schists to alternating beds of slate in western Tierra del Fuego and the Chonos Islands.
Comments on Sharpe’s theory of curved cleavage planes.
Example of metamorphosis in a "clay-slate porphyry region". Importance of previous lines of cleavage and stratification in foliation of metamorphosed rock.
| Author: | Charles Robert Darwin |
| Addressee: | Charles Lyell, 1st baronet |
| Date: | [21 Jan – 11 Feb 1855] |
| Classmark: | American Philosophical Society (Mss.B.D25.112) |
| Letter no: | DCP-LETT-1633 |
Document type
| letter | (3) |
Author
| Darwin, C. R. | (3) |
Addressee
| Lyell, Charles | (3) |
Correspondent
| Darwin, C. R. | (3) |
| Lyell, Charles | (3) |
