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Ramsay, A. C. in correspondent 
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DCP-LETT-1008

From:
Charles Robert Darwin
To:
Andrew Crombie Ramsay
Date:
10 Oct [1846]
Source of text:
Imperial College of Science, Technology, and Medicine Archives
Summary:

Thanks ACR for paper and comments on it ["On the denudation of South Wales", Mem. Geol. Surv. G. B. 1 (1846): 297–335].

Sends copy of South America.

Discusses action of the sea.

Criticises ACR’s views on sudden elevation of mountain chains.

Contributor:
Darwin Correspondence Project

DCP-LETT-1038

From:
Charles Robert Darwin
To:
Andrew Crombie Ramsay
Date:
21 Dec [1846]
Source of text:
American Philosophical Society (Mss.B.D25.52)
Summary:

Discusses the geological origin of terraces.

Mentions R. I. Murchison’s paper ["On the superficial detritus of Sweden", Q. J. Geol. Soc. Lond. 2 (1846) pt 1: 349–81].

Comments on Tertiary beds of South America. Doubts that durable formations are now accumulating. Discusses formation of trap-rock. Notes effect of decomposition of lava; discusses action of submerged gravel on underlying rock.

Contributor:
Darwin Correspondence Project
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