IODP SEDIS - Thesaurus -

Transcontinental Arch
BT	North America
	.Transcontinental Arch
RT	Canada
	United States
	Mexico
	Great Plains
	Midcontinent
SN	Prominent Middle Ordovician feature extending from the Canadian Shield, southwest across the Great Plains to NW Mexico. Indexed with states, countries, or regions as applicable. Added to Thesaurus in 1993.