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From:
Charles Robert Darwin
To:
Charles Lyell, 1st baronet
Date:
4 Dec [1849]
Source of text:
American Philosophical Society (Mss.B.D25.85)
Summary:

Discusses J. D. Dana’s Geology [1849]. Pleased that the part on corals confirms his views [Coral reefs (1842)]. Discusses Dana’s observation that in Sandwich Islands lava streams often join dikes at right angles with no cone. Retracts earlier denial of this possibility. Criticises Dana’s view of Australian valleys.

Contributor:
Darwin Correspondence Project