Benton Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Benton Formation
RTNew Mexico
 Wyoming
 Montana
 Colorado
 Nebraska
 Minnesota
 Kansas
 South Dakota
 Colorado Group
 Graneros Shale
 Carlile Shale
 Codell Sandstone Member
 Greenhorn Limestone
SNIn Colorado Group. Comprising Graneros Shale, Greenhorn Limestone and Carlile Shale as members. Contains Codell Sandstone Member. E Colorado, South Dakota, Kansas, S Minnesota, SE Montana, Nebraska, NE New Mexico, E Wyoming.