Intermediate to silicic volcanic rocks

Mostly andesitic to dacitic strato volcanoes. Includes rhyolite lavas and tuffs in the Jemez Mountains, Volcanoes in Jemez Mountains and eastern Colfax County are upper Miocene. Mount Taylor and composite volcanoes in the Taos Plateau volcanic field are Pliocene.
State New Mexico
Name Intermediate to silicic volcanic rocks
Geologic age Neogene
Lithologic constituents
Igneous > Volcanic > Mafic-volcanic > Andesite (Flow)
Igneous > Volcanic > Felsic-volcanic > Dacite (Flow)
Igneous > Volcanic > Felsic-volcanic > Rhyolite (Flow, Pyroclastic-tuff)
NGMDB product
Counties Cibola - Colfax - Los Alamos - McKinley - Rio Arriba - Sandoval - Taos - Union