140 million years ago: the generation of this ‘gravity hole’, the Indian Ocean The gravity hole can be traced back to 140 million years ago when it was a part of the now-non-existent Tethys Ocean ...

This story appears in the August 2010 issue of National Geographic magazine. Thirty-seven million years ago, in the waters of the prehistoric Tethys Ocean, a sinuous, 50-foot-long beast with ...

Areas near the coast were pummeled by seasonal monsoons, but ocean-circulation patterns kept the isolated and vast interior warm and dry. Even the Poles were ice-free. The Tethys Ocean filled the ...

The study reveals that the formation of the gravity hole is intricately linked to the demise of an ancient ocean called Tethys. As the supercontinent Gondwana fragmented 180 million years ago ...

A transcontinental drainage system transported sediments from the North China Craton into the eastern Paleo-Tethys Ocean in the Middle Triassic, as shown by a multi-proxy provenance and ...