Evolution of an ocean  [motion picture] / 
BBC-TV/Open University. 
 - Solana Beach, Calif. :  University Media,  1979. 
 - 1 film reel (24 min.) :  sd., col. ;  16 mm. +  1 guide. 
<br/><br/> Examines modern techniques which enable scientists to reconstruct the evolution of the size of the ocean in the geological past, including geophysical development and changes in current circulation and world-wide sea level. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Oceanography.<br/>Sea-floor spreading.