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Data sets Publications Expeditions Thesaurus
El Paso Group  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Ordovician
 ....Lower Ordovician
 .....El Paso Group
RTNew Mexico
 Texas
 Arizona
SNSE Arizona, S New Mexico and W Texas. Also search El Paso Formation NOT Argentina. Added to Thesaurus in 1989.