From:
Charles Robert Darwin
To:
Charles Lyell, 1st baronet
Date:
[21 Jan – 11 Feb 1855]
Source of text:
American Philosophical Society (Mss.B.D25.112)
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.
Contributor:
Darwin Correspondence Project