| Compositionally, the turbidites are mostly feldspathic litharenites with trace amounts of serpentinite, anorthosite and mafic volcanic clasts. |
| Recent buildings reflect our international reach: granite from Finland, Brazil, anorthosite from Lac SaintJean, the North Shore and so on. |
| Geological processes raised masses of anorthosite, or black granite, to the surface, which subsequently eroded. |
| The plagioclase crystals would have formed subcircular lenses of anorthosite that punctuated background chromite accumulation. |
| There is some grain size reduction of the troctolite adjacent to the anorthosite, indicating a chilling effect. |
| The anorthosite rock then cooled to form a solid crust above the hot, liquid mantle. |
