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Ramsay, A. C. in correspondent 
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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

DCP-LETT-1512

From:
Charles Robert Darwin
To:
Andrew Crombie Ramsay
Date:
9 Apr [1853]
Source of text:
American Philosophical Society (Mss.B.D25.106)
Summary:

Discusses geological foliation and cleavage. Urges ACR to read CD’s remarks on subject in his South America before ACR publishes his paper ["On the lower Palaeozoic rocks", Q. J. Geol. Soc. Lond. 9 (1853): 161–79].

Contributor:
Darwin Correspondence Project
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