Lapidus, Dorothy Farris <br/><br/>
The facts on file :  dictionary of geology and geophysics / 
Dorothy Farris Lapidus 
 - New York :  Facts On File Publications,  c1987 
 - 384 pages :  illustrations ;  23 cm. 
<br/><br/> The concept of sea-floor spreading, the constant generation of new sea floor, offered a reason for why oceanic crust is younger than continental crust. 
<br/><br/><label>ISBN: </label>871967030 
<br/><br/><label>Subjects--Topical Terms: </label><br/>HISTORICAL GEOLOGY
<br/><br/><label>LC Class. No.: </label>QE 5 .L37 1987