ANADARKO

APPALACHIAN

ARDMORE

ARKOMA

BLACK WARRIOR

CHEROKEE PLATFORM

TX-LA-MS SALT

FOREST CITY

FORT WORTH

ILLINOIS

MARFA

PERMIAN

SAN JUAN

VALLEY AND RIDGE

WILLISTON

GREATER GREEN RIVER

MONTANA THRUST BELT

PALO DURO

PARADOX

UINTA-PICEANCE

MARIETTA

DENVER

POWDER RIVER

NORTH PARK

WESTERN GULF

SAN JOAQUIN BASIN

VENTURA BASIN

SANTA MARIA BASIN

LOS ANGELES BASIN

RATON BASIN

BIGHORN

MICHIGAN