Intermediate to silicic volcanic rocks (NMTnv;0)

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	Major Igneous > Volcanic > Mafic-volcanic > Andesite (Flow) Igneous > Volcanic > Felsic-volcanic > Dacite (Flow) Igneous > Volcanic > Felsic-volcanic > Rhyolite (Flow, Pyroclastic-tuff)
References	Green, G.N., Jones, G.E., and Anderson, O.J., 1997, The Digital Geologic Map of New Mexico in ARC/INFO Format: U.S. Geological Survey Open-File Report 97-0052, 9 p., scale 1:500,000. https://pubs.er.usgs.gov/publication/ofr9752
NGMDB product	NGMDB product page for 59219 NGMDB product page for 22974
Counties	Cibola - Colfax - Los Alamos - McKinley - Rio Arriba - Sandoval - Taos - Union

Intermediate to silicic volcanic rocks

Green, G.N., Jones, G.E., and Anderson, O.J., 1997, The Digital Geologic Map of New Mexico in ARC/INFO Format: U.S. Geological Survey Open-File Report 97-0052, 9 p., scale 1:500,000.