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Below is a list of some other places where you can see outcroppings of Madison Limestone. It can be found near the surface in the sky-blue areas (labelled uPZ in some places) on this Geologic Map of Montana (click on the map to enlarge it when the page opens up).
Confidence votes 18. Gneiss is a banded or foliated metamorphic rock, of similar composition to granite. It is very hard and used where granite would be used, some gneisses are used as facing stone on buildings.counter tops.o. Gneiss is a high-grade metamorphic rock. Even if the gneiss  formed from what was originally a fossil-containing rock, the  metamorphism will have destroyed the fossils.