. . . . . . . . . . . . . . . . . . . . . . "Niobrara Chalks" . . . . "Niobrara Member" . . . . . . "Smoky Hill Jasper" . . "Niobrara Sea" . "Niobrara" . . . . . . . "Niobrara Chalk" . "Niobrara Formation" . "Niobrara Formation" . . . . . . . .