Upper middle Tertiary volcanic rocks

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
Igneous > Volcanic > Mafic-volcanic > Basaltic-andesite (Flow, Pyroclastic-tuff)
Igneous > Volcanic > Felsic-volcanic > Rhyolite (Flow, Pyroclastic-tuff, Pyroclastic-ash flow)
NGMDB product
Counties Catron - Grant - Hidalgo - Luna - Sierra - Socorro - Taos