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From:
Charles Robert Darwin
To:
Charles Lyell, 1st baronet
Date:
[1 Nov 1849]
Source of text:
American Philosophical Society (Mss.B.D25.83)
Summary:

Discusses CL’s refutation of CD’s concept of "craters of elevation" and CL’s new concept of "craters of denudation". Mentions examples of such craters. Admits that his own concept of these craters was unsatisfactory. Urges CL to publish article ["On craters of denudation", Q. J. Geol. Soc. Lond. 6 (1850): 207–34].

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Charles Lyell, 1st baronet
Date:
[18 Nov 1849]
Source of text:
American Philosophical Society (Mss.B.D25.84)
Summary:

Criticises Élie de Beaumont’s view of a right angle junction of a stream of lava and a dike.

Mentions his misgivings in voting to recommend J. D. Forbes for Royal Medal.

Notes Daniel Sharpe’s work on mica schist.

Contributor:
Darwin Correspondence Project