granite, garnet-biotite gneiss and biotitesillimanite schist compose the lower part of the drilled section down to the limiting depth.
1989): a) chilled margin facies, b) central facies and c) pegmatoid
Overlying the banded ironstone is a coarse-grained, black pegmatoid
consisting of augite and inverted pigeonite with minor plagioclase and olivine.
The granites are mainly massive, pegmatoid
texture is common, gneissic varieties are rare, while porphyraceous texture occurs very seldom.
and gabbroid layers in Jurassic Preakness and Hook Mountain basalts, Newark Basin, New Jersey.
Typical fabrics include a weak to strong foliation trending ENE, gradational contacts and metasomatic changes to pegmatoid
and mylonitic rock types.
Where the UG2 is narrower than the minimum stoping width of 1 m, a proportion of the footwall pegmatoid
or hanging-wall pyroxenite is also mined.