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Sopwith Model VI: Intersecting mineral veinsThis Model, rather than representing the strata as they would appear at the surface, shows how a seam of coal can be displaced in the subsurface by various modes of faulting
Sopwith Model V: Dislocations of coal strataThis model shows that while very little coal may appear at ground level, coal seams (subject to faults and dislocations) can be found below the ground
