The UG2 chromitites are underlain by pyroxenite footwall that is distinct from hanging wall pyroxenite. The erupted rocks also contain xenoliths such as lherzolite, pyroxenite and wehrlite. Rock types include picrite, peridotite, dunite, pyroxenite, gabbro and granophyre. Its igneous rock consists mostly of pyroxenite and gabbro. Granulite and pyroxenite xenoliths have also been found. In addition, there is commonly a layer overlying both composed of feldspathic pyroxenite. The igneous rock is mostly mafic with much gabbro, essexite, and a titanium-rich pyroxenite. Several northeast-trending deformation zones intersect pyroxenite of a mafic sill in northwest Strathy Township. They consist of lherzolite, harzburgite, wehrlite, dunite, websterite and garnet composed pyroxenite. This magma produced the layered pyroxenite dunite in the ultramafic area. Many pyroxenite dikes less than wide intrude every geologic formation in the township.