Entrada Sandstone  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Jurassic
 ....Upper Jurassic
 .....Entrada Sandstone
RTNew Mexico
 Utah
 Colorado
 Arizona
 San Rafael Group
SNIn San Rafael Group. Utah, Colorado, NE Arizona and NW New Mexico. Added to Thesaurus in 1985.