Petroleum source, perhaps (3,4)
Else clues• Giant sight
• There Will Be Blood site
• Black gold gusher
• Cap site
• Crude construction?
• Crude contraption
• Crude hole
• Crude structure?
• Drilling result
• Fuel source
• Gusher
• Kuwait sight
• Kuwaiti structure
• One of Rockefeller's many
• Permian Basin sight
• Spindletop sight
• Wildcat, e.g.