Native metal brass, bronze, pewter, German silver, osmiridium, electrum, white gold, and silver-mercury and gold-mercury amalgam. Only gold, silver, copper and the platinum metals occur in nature in large amounts. Over geological time scales, very few metals can resist natural weathering processes like oxidation, which is why generally only the less reactive metals such as gold and platinum are found as native metals. The others usually occur as isolated pockets where a natural chemical process reduces a common compound or ore of the metal, leaving the pure metal behind as small flakes or inclusions. Non-metallic elements occurring in the native state include
Ore Run Formation. The upper reaches of the stream flow over rock of the Burgoon Sandstone formation. Rock outcroppings are present in the watershed. The entire length of the stream flows over soil of the Deep-Wellsboro-Oquaga soil association, except for the headwaters, which are on soil of the Oquaga and another, minor soil association. Most of these soils are highly acidic. There is a bed of iron ore on Ore Run. The watershed of Ore Run has an area of . Ore Run is difficult to access. The Ore Run Falls are a cascade and slide waterfall on Ore Run. They are