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Malcolmson, J. G. in correspondent 
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From:
John Grant Malcolmson
To:
Charles Robert Darwin
Date:
24 July 1839
Source of text:
DAR 39: 7–10
Summary:

Detailed evidence for and against geological elevation along coast of the Indian subcontinent, South Asia, and Arabia. Extensive references to geological literature about these areas.

Describes coral sand-dune and salt-marsh formation.

Contributor:
Darwin Correspondence Project
From:
John Grant Malcolmson
To:
Charles Robert Darwin
Date:
31 Aug 1839
Source of text:
DAR 39: 11
Summary:

Observations on the geology of Arabia.

Contributor:
Darwin Correspondence Project
From:
John Grant Malcolmson
To:
Charles Robert Darwin
Date:
7 Oct 1839
Source of text:
DAR 39: 12–14
Summary:

Sends notes on soundings made on coral banks in the China Sea.

His recent geological observations.

Finds a difficulty with CD’s erratic block theory.

Contributor:
Darwin Correspondence Project
From:
John Grant Malcolmson
To:
Charles Robert Darwin
Date:
[after 7 Oct 1839]
Source of text:
DAR 50: C24–5
Summary:

Comments on the discussion of erratic blocks in Journal of researches [pp. 619, 621–2].

Contributor:
Darwin Correspondence Project
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From:
John Grant Malcolmson
To:
Charles Robert Darwin
Date:
30 Nov 1839
Source of text:
DAR 39: 15–17
Summary:

Sends specimens of coralline with vermiform holes.

J. Allan’s observations of Aldabra and the Cormoros [see Coral reefs, p. 186] and news of his experiments on the growth of coral.

Contributor:
Darwin Correspondence Project
From:
John Grant Malcolmson
To:
Charles Robert Darwin
Date:
2 Jan 1840
Source of text:
DAR 171: 31; Geological Society of London (Membership certificates, 1840)
Summary:

Discusses CD’s Glen Roy paper; would like to see the theory put beyond dispute. Tells of Mr Stables’ observations on the parallel roads. Discusses geological features of Scotland which he is sure are marine in origin.

Contributor:
Darwin Correspondence Project