The message in the rocks ( videorecording). 

 - London :  BBC Enterprises,  1980. 
 - 1 videocassette (U-matic) (57 min.) : sd., col. ; 3/4 in. 
 - Horizon ( videorecording) .
<br/><br/> Delves into the mystery of how our planet was formed and how it evolved into its present structure. Examines how clues to the earth's origins may be found in meteorites found in fossils in the Antartic dating back 3.5 billion years and in masses of ancient bacteria found at Mt. St. Helens. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Historical geology.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Earth--Origin.