As weathering is break down of the ricks or is the dissolving of the ricks by the minerals on earth surface since rock has been broken down erosion transfers these bits of rocks away and thus these materials are deposited in the rover deltas and hence Mississippi river most directly forms the surface materials.
This region has vast reserves of iron and coal ore. On top of that, iron ore is easily available at a cheap price in the region, therefore providing raw material for the industries.
