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

  1. 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 258  Page 285  End Slip 2, side 2  End Slip 2, side 2  
  2. A manual of elementary geology
    By: Lyell, Charles, Sir,
    Publication info: [s.n.], [s.n.], 1855
    Pages: Page 251  Page 350