THE STORY TOLD BY FOSSILS 



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come at last to bed rock, the material out of which the 

 original soil was made. All of these changes on the earth 

 have taken a very long time. Nature works slowly, 

 but Nature is always working. Everywhere the forces 

 of running water, the wind, ice, heat, and cold, are at work 

 changing the rocks into soil, just as they have been at 

 work in past ages. The earth's surface is constantly 

 changing, and some of the changes take place within our 

 own life span. 



One very interesting evidence of these changes on the 

 earth comes from the story told by fossils, or remains of 

 former life found imbedded in some rocks. Not only do 

 these remains show us that very different plants and 

 animals once lived on the earth, but they also show us 

 that great changes in life have been brought about through 

 the changes in climate and the alteration of the earth's 

 surface. The purpose of this unit is to tell the story of 



Wright Pierce 



Which of these pebbles was taken from the brook? Which from rocks on the 



mountainside ? 



how the earth became a place fit for living things to grow 

 on, how the living things have changed, and how and why 

 the earth has become fitted for life today. 



