4 Pages in Charles Darwin's Library associated with "geology - schist, argillaceous"

Description physique des Îles Canaries, suivie d'une indication des principaux volcans du globe.
By: Buch, Leopold von, Freiherr, - Boulanger, C.
Publication info: Paris :F.G. Levrault,1836.
Pages: Page 400 Page 400
Principles of geology.
By: Lyell, Charles.
Publication info: London :John Murray,1837.
Volume: v.4
Pages: Page 298 Page 339