oil shale  search
BTsedimentary rocks
 .oil shale
NTkukersite
UFshale oil
RTorganic compounds
 anthraxolite
 Anvil Points Mine
 shale
 petroleum
 energy sources
 kerogen
 retorting
 oil sands
 torbanite
SNBefore 1968, also search bituminous rocks and sands. See List C for use as a commodity term.