Mafic phaneritic intrusive rocks

Tertiary mafic intrusive rocks are widely scattered across Nevada north of Clark County. They include rocks mapped as dacite and rhyodacite, diorite, quartz latite, and numerous undivided intrusive rocks on the county maps.
State Nevada
Name Mafic phaneritic intrusive rocks
Geologic age Miocene to middle Eocene
Lithologic constituents
Major
Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-quartz-latite
Igneous > Plutonic > Dioritic > Diorite
Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-dacitedacite and rhyodacite
Minor
Igneous > Plutonicnumerous undivided intrusive rocks
References
NGMDB product
Counties Churchill - Esmeralda - Eureka - Humboldt - Lander - Lincoln - Lyon - Mineral - Nye - Pershing - Storey - Washoe - White Pine