USGS Geology URL
USGS Geology Name
Lago Garzas-Anon Formations Interbedded
USGS Geology Age
Upper Eocene (?) to Upper Campanian
USGS Lithologic Constituents
Dark-red, non-pillowed andesite lava flows and volcanic breccia irregularly interbedded with hornblende-dacite-rhyodacite lava flows, sandstone-siltstone, and tuff characteristic of the Anon Formation,