Much interested in BS's letter on gneiss ["Remarks on the geological relations of the gneiss of the Alps", Edinburgh New Philos. J. 42 (1847): 186–7].
Sends copy of South America.
Has shown that lamination of metamorphic schists closely allied with cleavage.
Down Farnborough | Kent
I have been so much interested by a letter of yours, in the last Edinburgh New Philosoph. Joournal, on the laminæ in gneiss not having been formed as planes of deposition, that I have taken the liberty to send you a copy of my Geolog. Observ. on S. America, published last autumn on account of a discussion on this subject. If you read English I hope you will take the trouble to read from p. 162 to 168, in which I have endeavoured to show that the lamination (denominated by me foliation after a suggestion of Prof. Sedgwick) of the metamorphic schists is a closely allied phenomenon with cleavage.
With many apologies for my presumption in thus addressing you, I beg to remain with much respect | Your faithful & obedt. sert | Charles Darwin
- f1 1054.f1Studer 1847b.
- f2 1054.f2Sedgwick 1835, pp. 477–80.