Man's physical universe

xanabras

THE ORIGIN AND AGE OF THE EARTH 129

influenced by the scientific

hypotheses.

attitude than one's attitudes toward his

Fig. 34. The Colorado River and the Grand Canyon from the north rim at

Cape Royal, Arizona. (Courtesy of the Union Pacific Railroad.)

The Age of the Earth Has Been Estimated by Many Methods.

At one time all of the water in the earth was probably fresh water.

The salt in the oceans was brought there by the rivers from the land.

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