8 Pages in Charles Darwin's Library associated with "geology - gravel"

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 412 Page 412 Page 415
A history of British fossil mammals and birds
By: Owen, Richard,
Publication info: London, John Van Voorst, 1846
Pages: Page 430
Principles of geology
By: Lyell, Charles, Sir,
Publication info: London, John Murray, 1837
Volume: v.1
Pages: Page 144 Page 144 Page 304 Page 304