On Specimens in the Peter Redpath Museum of Mcgill University Illustrating the
On Specimens in the Peter Redpath Museum of Mcgill University Illustrating the
John William Dawson
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156. § The depth of the channel between the Canaries and Africa is stated at 5, 000 feet. B 18 SIR J. W. DAWSON-, C. M. G. , F. R. S. , ETC. , ON SPECIMENS portion at least of the Araerican aborigines reached Amenca trom the eastern side of the Athmtic. Nor should -we omit to notice tiiat volcanic islands like the Canaries, rising from great depths in the ocean, may not be of long durati(. N in geological time, and that in the early human period there may have been chains of such islands connec...ting the Mediterranean volcanic belt with that of the West Indies, and which have since disap- peared by erosion or by subsidence. The existence even in comparatively modern times of such insular connection would be in no respect contradictory to the known facts as to the ancient insularity of the Canaries already stated. Even the supposition that the Canaries may in the early modern period have belonged to a much larger insular region is not excluded by the facts of physical geography already referred to, since there may have been subsidence correlative to the great elevation of the mountains of these islands ; a consideration which has not been sufficiently attended to by inquirers as to the fauna and flora of the Atlantic Islands.
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