Map showing outcrops of pre-Quaternary ash-flow tuff and laharic breccia, Basin and Range Province, New Mexico

Abstract

Countyarea Map number symbol Geologic unit Geologic and radiometric age, in mill ions of years (m.y.) Lithology and comments References for county area CATRON COUNTY (C) C-l Tt South Canyon Tuff Lemitar Tuff 01 igocene 26.7 m.y., average age 01 igocene Multiple flow, simple cooling unit of rhyolite ash-flow tuff; slightly to densely welded with few crystals; outflow fades regionally as much as 600 ft thick. Overlies La Jara Peak Basaltic Andesite.