| 单词 | proto-ocean | 
| 释义 | > as lemmasproto-ocean   proto-ocean  n.  Brit.  , U.S.   Geography an ocean at an early stage of its development.ΘΚΠ the world > the earth > water > sea or ocean > 			[noun]		 > ocean, open sea, or deep sea > proto-ocean Panthalassa1893 proto-ocean1973 1973    Philos. Trans. 		(Royal Soc.)	 A. 273 329  				The greenstone belts are intra-continental mini-geosynclines.., which are predecessors of early Proterozoic proto-oceans. 1975    Nature 29 May 376/1  				Young rift oceans (proto-oceans) are commonly the site of large scale evaporite deposition. 1988    Jrnl. Atmospheric Sci. 45 3081 		(title)	  				Evolution of an impact-generated H2O-CO2 atmosphere and formation of a hot proto-ocean on earth. < as lemmas  | 
	
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