Waterways of the World
Information on Earth's Oceans, Seas, Lakes & Rivers
Earth's Oceans
 
Billions of years ago when the earth was just forming, there were no oceans; the planet was much hotter than today as matter came together to form the original planet. As the earth began to cool down, water held within the rocks that formed the earth's mantle began to seep upwards. Gaseous water vapor in the primitive atmosphere condensed and fell as the first rain. You can still see this subterranean water coming to the surface in the form of geysers at places such as Yellowstone Park. Over millions of years this water formed the oceans. Originally this water didn't have a lot of salts dissolved in it, but over time, it became the salty seawater we have today. 
Select an ocean of interest below:
 
 
 
 
 
 
 
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