The summit of Mt. Everest is made of marine limestone which means the highest point on earth was once at the bottom of the sea. – WTF Fun Facts
Source: http://www.montana.edu/everest/facts/summit-limestone.html
WTF Fun Fact – Sea Floor On Mountains

The summit of Mt. Everest is made of marine limestone which means the highest point on earth was once at the bottom of the sea. – WTF Fun Facts
Source: http://www.montana.edu/everest/facts/summit-limestone.html