Bituminous

1. Containing bitumen.
2. Pertaining to bituminous coal. AGI
3. Having the odor of bitumen; often applied to minerals.
4. Yielding volatile bituminous matter on heating (for example, bituminous coal). AGI
5. Containing much organic, or at least carbonaceous, matter, mostly in the form of the tarry hydrocarbons, which are usually described as bitumen.

Source: Dictionary of Mining, Mineral, and Related Terms