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To John Phillips   18 January [1856]


Discusses chapter [6] on cleavage and foliation in South America. Notes especially cleavage where two series cross and cleavage as basis of foliation in metamorphosed rock. Notes foliation in rocks that have been liquefied by heat. Mentions case described in his "Geology of the Falkland Islands" [Collected papers 1: 203–12]. Discusses relationship of cleavage to beds. Speculations on association between grauwacke and clay-slates.

Author:  Charles Robert Darwin
Addressee:  John Phillips
Date:  18 Jan [1856]
Classmark:  American Philosophical Society (Mss.B.D25.122)
Letter no:  DCP-LETT-1822

To John Phillips   28 January [1856]


Thanks JP for beautiful book [? The rivers, mountains and sea-coast of Yorkshire, 2d ed. (1855)].

Author:  Charles Robert Darwin
Addressee:  John Phillips
Date:  28 Jan [1856]
Classmark:  Oxford University Museum of Natural History Archive Collections (John Phillips collection))
Letter no:  DCP-LETT-1828
Document type
letter (2)