6 Pages in Charles Darwin's Library associated with "strata/epochs - liassic"

A manual of elementary geology.
By: Lyell, Charles.
Publication info: [s.n.] :[s.n.],1855.
Pages: Page 316 Page 319 Page 335 Page 342
Principles of geology.
By: Lyell, Charles.
Publication info: London :John Murray,1837.
Volume: v.4
Pages: Page 292 Page 310