This extensive volcanism constructed a large lava plateau with an area of 170,000 km2 ( 66,000 sq mi ) , representing a volume of lavas of at least 500,000 km3 ( 120,000 cu mi ) .
This extensive volcanism constructed a large lava plateau with an area of 170,000 km2 ( 66,000 sq mi ) , representing a volume of lavas of at least 500,000 km3 ( 120,000 cubic miles ) .