Triassic Fishes of Connecticut (Classic Reprint)

Triassic Fishes of Connecticut (Classic Reprint)

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Excerpt from Triassic Fishes of Connecticut
SO much by way Of parenthesis. Enough has now been said to show that the natural history of the past possesses rich interest from a culturo-historical or humanistic standpoint. And from these matters we pass on to a consideration of our special theme, the study of fossil fishes in general. Before speaking, however, of the introduction and succession of the class of fishes in point of chronological sequence, it may be useful to insert at this point a table showing the principal divisions of the stratigraphic column, which will serve the double purpose of indicating the position of our Triassic rocks in the system, and marking the advent of successively higher classes Of vertebrates. Forma tional units, it is to be Observed, are divided into systems, series, and groups; and the corresponding time-relations are expressed by the terms eras (or ages), periods, and epochs. Following is the commonly accepted arrangement.
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Product details

  • Paperback | 92 pages
  • 152 x 229 x 5mm | 136g
  • Forgotten Books
  • United States
  • English
  • , black & white illustrations
  • 0243200161
  • 9780243200160