Gabbro and diabase

Foliated to nonfoliated and coarse- to fine-grained; includes mafic dikes tentatively correlated with Chickwolnepy intrusions.
State New Hampshire
Name Gabbro and diabase
Geologic age Middle Ordovician
Lithologic constituents
Major
Igneous > Plutonic > Gabbroic > GabbroFoliated to nonfoliated and coarse- to fine-grained; includes mafic dikes tentatively correlated with Chickwolnepy intrusions.
Igneous > Volcanic > Mafic-volcanic > Basalt (Diabase)Foliated to nonfoliated and coarse- to fine-grained; includes mafic dikes tentatively correlated with Chickwolnepy intrusions.
Comments Rocks of the Chickwolnepy intrusions in northern New Hampshire (Middle Ordovician).
References
NGMDB product
Counties Coos