10 Pages in Charles Darwin's Library associated with "strata/epochs - silurian"

  1. Contributions to the natural history of the United States of North America.
    By: Agassiz, Louis,
    Publication info: [s.n.] :[s.n.],n.d..
    Pages: Page 31  Page 100  
  2. A manual of elementary geology.
    By: Lyell, Charles.
    Publication info: [s.n.] :[s.n.],1855.
    Pages: Page 424  Page 447  Page 448  Page 449  Page 450  Page 451  Page 458  Page 463