Montoya Group  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Ordovician
 ....Montoya Group
RTNew Mexico
 Texas
 Arizona
SNMiddle and Upper Ordovician. Arizona, S New Mexico and W Texas. Includes Cable Canyon Sandstone, Upham Dolomite, Aleman Formation and Cutter Formation. Added to Thesaurus in 1989.