File talk:Marcellus Shale Gas Drilling Tower 1 crop.jpg

The caption reads "tower for fracturing of marcellus shale." That is incorrect. That is a drill rig. Fraccing setups involve a much smaller shorter valve tree on top of the well to which are attached anywhere from 5-30 massive engines/pumps mounted on the back of semi trucks etc. This happens after the drill rig as left the area.