Geologic map of the Truth or Consequences 30' x 60' minute quadrangle (1:100,000 scale)
Richard W. Harrison, Richard P. Lozinsky, T. L. Eggleston, W. C. McIntosh · 1993
Bearwallow Mountain Formation:Trachy-basalt and trachyandesite lavas, both intrusive and extrusive; WAr ages range from approximately 20 to 25 Ma (Elston, 1976;Elston et al., 1973;Woodard, 1982;and Stinnett, 1980).Includes andesite of Winston graben: trachyandesite lava flows, breccia deposits, and vent breccias; dated by WAr method at 18.3 & 0.4 Ma (Seager et al., 1984); interbedded with Santa Fe Group in the Winston graben.Tuff of Garcia Camp: Rhyolite ignimbrite; poorly welded, moderately crystal rich (quartz, sanidme, and biotite); Ar/Ar date of 28.10 (McIntosh, 1989); this unit is found only in Taylor Creek area, where in interfingers with basa! portion of the Gila Conglomerate.