Hornblende-biotite quartz syenite to syenite

Hornblende-biotite quartz syenite to syenite.
State New Hampshire
Name Hornblende-biotite quartz syenite to syenite
Geologic age Late Ordovician
Lithologic constituents
Major
Igneous > Plutonic > Syenitic > Syenite (Pluton)Hornblende-biotite quartz syenite to syenite.
Igneous > Plutonic > Syenitic > Quartz-syenite (Pluton)Hornblende-biotite quartz syenite to syenite.
Comments Part of the Oliverian Plutonic Suite (Late Ordovician) - Pink, weakly to moderately foliated, locally porphyritic biotite granitoids found in mantled gneiss domes. Mafic varieties contain hornblends. Variably metamorphosed up to amphibolite facies.
References
NGMDB product
Counties Coos