I collected this near Seneca Rocks, West Virginia, back in ~1966. My wife and I were touring part of "West by god Virginia" (proud name applied by proud people) with my parents, and I just ‘happened’ to see a fine fault exposure in one of the road cuts, and managed to bring this home with me. I like the fact that in this one small rock it is possible to see the intersecting of faults, and with a coordination of movement that is clear in the slickenline orientations. Moreover, this rock is a great example of zones of fault intersections becoming places where fluids, in this case hydrocarbons, migrate because of the porosity and permeability of such zones.
Age & Formation
Paleozoic limestone. Formation uncertain.