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Upper middle Tertiary volcanic rocks

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Mostly a combination of basaltic andesite lavas and rhyolitic ash-flow tuffs of the Mogollon Group (Tuau+Tual+Turp). Includes locally erupted lavas and tuffs in some calderas.
State New Mexico
Name Upper middle Tertiary volcanic rocks
Geologic age Lower Miocene to upper Oligocene (younger than 30 Ma)
Lithologic constituents
Major
Igneous > Volcanic > Mafic-volcanic > Basaltic-andesite (Flow, Pyroclastic-tuff)
Igneous > Volcanic > Felsic-volcanic > Rhyolite (Flow, Pyroclastic-tuff, Pyroclastic-ash flow)
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 Catron - Grant - Hidalgo - Luna - Sierra - Socorro - Taos