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Silicic to intermediate volcanic rocks

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Rhyolite and dacite flows with associated minor tuffs. Commonly interbedded with Santa Fe or Gila Group sedimentary units. Dacitic lavas in northern Jemez Mountains are Pliocene.
State New Mexico
Name Silicic to intermediate volcanic rocks
Geologic age Neogene, mostly Miocene
Lithologic constituents
Major
Igneous > Volcanic > Felsic-volcanic > Rhyolite (Flow, Pyroclastic-tuff)
Igneous > Volcanic > Felsic-volcanic > Dacite (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
Counties Bernalillo - Catron - Cibola - Colfax - Grant - Los Alamos - Rio Arriba - Sandoval - Sierra - Socorro - Taos