From:
Charles Robert Darwin
To:
Charles Lyell, 1st baronet
Date:
20 May 1869
Source of text:
American Philosophical Society (Mss.B.D25.370)
Summary:
Cites article by David Forbes dealing with the geology of the S. American Cordillera ["Geology of Bolivia and South Peru", Q. J. Geol. Soc. Lond. 17 (1861): 7–62].
Discusses the flexures of the Cordillera, the age of the mountains, and basaltic dikes in granite areas.
Contributor:
Darwin Correspondence Project