Barnes-Svarney, Patricia L. <br/><br/>
Clocks in the rocks :  learning about earth's past / 
Patricia L. Barnes-Svarney. 
 - Hillside, N.J., U.S.A. :  Enslow,  1990. 
 - 64 p. :  ill. 
 - An Earth processes book .
<br/><br/>Includes bibliographical references. 
<br/><br/> Discusses the divisions of time geologists use to record Earth's history and includes information on fossils, radioactive dating, and prehistoric life. 
<br/><br/><label>LCCN: </label>89007698 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology.
<br/><br/><label>Dewey Class. No.: </label>551.7