Portal:Earth sciences/DYK/21

Dabusun Lake

... that Dabusun Lake (pictured) is the largest remaining lake in China's Qarhan Playa, which 30,000 years ago held a single lake spreading over at least 25,000 km² (9,700 sq mi)?
... that the Trout Creek Hill volcanic eruption approximately 340,000 years ago, during the Pleistocene, produced a lava flow that extended 20 km (12 mi), temporarily damming the Columbia River?
... that Takuyo-Daisan was once an island in the South Pacific but is now a seamount off Japan?
... that the name of Melimoyu, a volcano in Chile, means "four breasts"?
... that a former island is named after the Massachusetts Institute of Technology?
... that an underwater mountain between Greenland and Norway has been compared to a coral reef?