Perkins Run Gabbronorite Suite
Perkins Run Gabbronorite Suite johncallahanThe following description is published in GM10 Bedrock Geologic Map of The Piedmont of Delaware and the Adjacent Pennsylvania, Schenck, W.S., Plank, M.O., and Srogi, L., 2000.
Fine- to coarse-grained gabbronorite and minor diorite with subophitic to ophitic textures, variably foliated or lineated. Plagioclase, orthopyroxene, clinopyroxene, and hornblende are major minerals; biotite and olivine locally present. Olivine typically surrounded by corona structures as described for the Bringhurst Gabbro. Contemporaneous with the Ardentown Granitic Suite.
Subtitle
Piedmont Unit
Formation Type
perkins-run-gabbronorite-suite
Geologic Unit Symbol
Spgs
Geologic Time Period
Silurian