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DCP-LETT-592

From:
Charles Robert Darwin
To:
Charles Lyell, 1st baronet
Date:
[Mar 1841]
Source of text:
American Philosophical Society (Mss.B.D25.27)
Summary:

Discusses the role of ice in determining the geological features of the Jura. Mentions view of Agassiz. Objects to idea of "a [sea of ice] carrying rocks". Notes Agassiz’s earlier view of "ice expanded in the line of the Great Swiss Valley". Comments on Pentlands.

Contributor:
Darwin Correspondence Project

DCP-LETT-594

From:
Charles Robert Darwin
To:
Charles Lyell, 1st baronet
Date:
[9 Mar 1841]
Source of text:
American Philosophical Society (Mss.B.D25.23)
Summary:

Defends his theory [in "Parallel roads of Glen Roy" (1839), Collected papers 1: 87–137] against the view that the "roads" were formed by glacial action.

Contributor:
Darwin Correspondence Project

DCP-LETT-595

From:
Charles Robert Darwin
To:
Charles Lyell, 1st baronet
Date:
[12 Mar 1841]
Source of text:
American Philosophical Society (Mss.B.D25.25)
Summary:

Discusses at length Louis Agassiz’s book [Études sur les glaciers (1840)] and Agassiz’s explanation of moraines. Defends his own theory of the importance of floating ice. Relates glacier theory to his own interpretation of Glen Roy.

Mentions a paper he is writing on South American boulders and till [Collected papers 1: 145–63].

Contributor:
Darwin Correspondence Project
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