Page:Popular Science Monthly Volume 53.djvu/41

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29
THE WEST INDIAN BRIDGE.

duration of geological time. It is such magnificent land forms as these plateaus and great valleys, found submerged beneath the sea, which have furnished us with the means for measuring the terrestrial

PSM V53 D041 Matterhorn plateau and valley.jpg
Plate IV.—View of the Matterhorn, Plateau and Valley. From a painting by Mr. Charles J. Way.

movements in the opposite direction which have reduced the West Indian region to a group of islands.

As to the causes of these terrestrial movements, at present little can be said. Changes of level of land and sea, similar to those found