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LEDGES.   ~)3

 

some with two legs, some with six, some with none.

This reef or ledge is called quartzite be-cause it is made up of grains of quartz sand that were made by rocks rolling each other on a seashore that existed before the "mountains were brought forth," before animal life existed on the naked, treeless land of the world. Time must be reckoned by many million years since the sand beach was formed that in the long run went to the making of this old ledge at our feet. One might be tempted to deny that we can know so much of its age, but careful study makes it certain that we do know. This earth is a globe for the same reasons that a dewdrop hanging on a grass-blade, or a rain-drop falling through the air, is a globe. It was once liquid, and took this shape by laws of attraction, as the sun, moon, and stars did the same. All the rocks and metals were once melted; then there was no water and no atmosphere like we now have. Hydrogen and oxygen gases became chemically united, and water was the result. The first rain was warm ; the first ocean covered all the earth, and was boiling hot ; the steam from it cooled and returned, as rain, and was sent back, and thus the ocean was cooled. No one was there to observe all


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