Greenhorn Limestone  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Upper Cretaceous
 .....Greenhorn Limestone
RTNew Mexico
 Wyoming
 Montana
 Colorado
 Nebraska
 Kansas
 South Dakota
 Colorado Group
 Benton Formation
 Bridge Creek Limestone Member
SNOf Colorado Group. Includes Lincoln Limestone, Jetmore Chalk, Hartland Shale, Pfeifer Shale, Bridge Creek Limestone Member, Orman Lake Limestone Member.