Show coal formation hiie geological guney says that coal liwa not occur in veins but in strata that Is it was deposited nn Is now found in layers between and parallel with other layers or beds of rock just ag one leaf in a bofe bobe occurs between and Is parallel pa rullel with the other leaves of lie book aliese layers are wrongly called veins but true velim rut across kimta of belac alth tl pm black hydrocarbon minerals super resembling coal but related to the do occur in veins that cut atra the inclosing strata the veins of norths estern colorado ar examples |