Tertiary-Cretaceous intrusive rocks

Includes granodiorite to quartz monzonite stocks and plutons at Hanover, Fierro, Tyrone, Lordsburg, and the 73 Ma quartz monzonite porphyry stock at Copper Flatsin Sierra County. Also includes many norhteast-trending monzonite porphyry dikes in the Silver City region.
State New Mexico
Name Tertiary-Cretaceous intrusive rocks
Geologic age Paleocene and upper Cretaceous
Lithologic constituents
Major
Igneous > Plutonic > Syenitic > Quartz-monzonite (Pluton, Stock or pipe, Dike or sill)granodiorite to quartz monzonite stocks and plutons; many northeast-trending monzonite porphyry dikes
Igneous > Plutonic > Granitic > Granodiorite (Pluton, Stock or pipe)granodiorite to quartz monzonite stocks and plutons
References
NGMDB product
Counties Grant - Hidalgo - Sierra