File:Wonders of earth, sea and sky 38.jpg

Identifier: youngfolkslibrar11aldr (find matches)
Title: Young folks library
Year: 1902 (1900s)
Authors: Aldrich, Thomas Bailey, 1836-1907
Subjects: Children's literature
Publisher: Boston, CT : Hall and Locke
Contributing Library: Internet Archive
Digitizing Sponsor: Internet Archive

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p a singularband of shingles, squeezed into the cliff, as it were,with chalk below and earth above. That is believed to be an old sea-beach. Once upona time the waters of the sea are supposed to havewashed those shingles, as now they wash the shorenear which we stand, and all the white cliff must havelain then beneath the ocean. Geologists were for a long while sorely puzzled toaccount for these old sea-beaches, found high up inthe chffs around our land in many different places. They had at first a theory that the sea must once,in far back ages, have been a great deal higher thanit is now. But this explanation only brought aboutfresh difficulties. It is quite impossible that the levelof the sea should be higher in one part of the worldthan in another. If the sea around England were thenone or two hundred feet higher than it is now, it musthave been one or two hundred feet higher in everypart of the world where the ocean-waters have freeflow. One is rather puzzled to know where all the
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View in a Canon. What the Earths Crust is Made of 15 water could have come fronij for such a tremendousadditional amount. Besides, in some places remainsof sea-animals are found in mountain heights, as muchas two or three thousand feet above the sea-level — as,for instance, in Corsica. This very much increases thedifficulty of the above explanation. So another theory was started instead, and this isnow generally supposed to be the true one. What ifinstead of the whole ocean ha^dng been higher, partsof the land were lower ? England at one time, partsof Europe at another time, parts of Asia and Americaat other times, may have slowly sunk beneath theocean, and after long remaining there have slowlyrisen again. This is by no means so wild a supposition as it mayseem when first heard, and as it doubtless did seemwhen first proposed. For even in the present daythese movements of the soHd crust of our earth aregoing on. The coasts of Sweden and Finland havelong been slowly and steadily ris

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