8 Pages in Charles Darwin's Library associated with "strata/epochs - wealden"

A history of British fossil mammals and birds
By: Owen, Richard,
Publication info: London, John Van Voorst, 1846
Pages: Page xv Page 546
A manual of elementary geology
By: Lyell, Charles, Sir,
Publication info: [s.n.], [s.n.], 1855
Pages: Page 251 Page 268 Page 350 End Note
Principles of geology
By: Lyell, Charles, Sir,
Publication info: London, John Murray, 1837
Volume: v.4
Pages: Page 284 Page 310