 A strata coaster is a type of roller coaster with a height or drop of at least .As with the other two height classifications, the term "strata" was first introduced by Cedar Point with the release of Top Thrill Dragster, a roller coaster that opened in 2003.Another strata coaster, Kingda Ka, opened at Six Flags Great Adventure in 2005 as the tallest roller coaster in the world featuring a height of .