Transactions and Proceedings of the Royal Society of South Australia (Incorporated) Volume 7-8

Transactions and Proceedings of the Royal Society of South Australia (Incorporated) Volume 7-8

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1885 edition. Excerpt: ...America, and Australia have in each case free access to migrate northwards in the event of the isothermal conditions in the southern arts of these continents getting colder. But so far as Africa an Australia are concerned, at least, considering the great expanse and ocean depths that are situated to the south of these countries, it is questionable if the existing fauna were driven northwards by an increase of cold, whether the breaches thus caused in the ranks of animal life in these regions would be immediately replenished by others indigenous to a colder habitat. With regard to Australia, New Zealand might be looked upon as being a sort of halting place in the passage of marine life passing between the frigid waters of the antarctic circle and those of a more temperate character which encircle the southern shores of Australia. But if the depth of sea be considered which lies between the shores of Victoria and New Zealand, it becomes almost an im ossibility that such a highway could have been available for the migration of animal life during the time of the last extreme glaciation. The resembling character existing between the non-fossiliferous clayey Miocene beds, also the upland Miocenes, and the more recent deposits constituting our seaboard plains, forcibly show that all were originated in a similar manner. Since the foregoing was written I have revisited the grooved and striated rock surface at Black Point, Holdfast Bay, and from what I then saw and could determine, the views as stated in this paper regarding the phenomena were fully substantiated. On the top of the sea-cliff, where the surface of the bed-rock has been exposed to the action of the north winds and that of the sea for centuries, the grooved and striated rock-surface...
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Product details

  • Paperback | 130 pages
  • 189 x 246 x 7mm | 245g
  • United States
  • English
  • black & white illustrations
  • 1236806697
  • 9781236806697