Bandelier Tuff

Includes large blocks of older andesite in caldera-collapse breccia facies locally exposed on resurgent dome of the Valles caldera.
State New Mexico
Name Bandelier Tuff
Geologic age Lower Pleistocene
Lithologic constituents
Major
Igneous > Volcanic > Felsic-volcanic (Pyroclastic-tuff, Pyroclastic-ash flow)desciption in GEOLEX implies rhyolite and mostly ash-flow
Minor
Igneous > Volcanic > Mafic-volcanic > Andesite (Volcaniclastic-volcanic breccia)Includes large blocks of older andesite in caldera-collapse breccia facies
References
NGMDB product
Counties Los Alamos - Rio Arriba - Sandoval - Santa Fe