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

Lake Superior: its character, vegetation, and animals, compared with those of other similar regions
By: Agassiz, Louis,
Publication info: Boston, Gould, Kendall & Lincoln, 1850
Pages: Page 197
A manual of elementary geology
By: Lyell, Charles, Sir,
Publication info: [s.n.], [s.n.], 1855
Pages: Page 319 Page 342 Page 351 Page 360 Page 407
Principles of comparative physiology
By: Carpenter, William Benjamin,
Publication info: London, John Churchill, 1854
Pages: Page 115 Page 116