Carbonaceous (adjective)

Consisting of, containing, or resembling carbon; of or relating to coal.

Origin:

Late 19th century: from carbon + -aceous.

Examples:

1. The carbonaceous shale contained large deposits of hydrocarbons.
2. The carbonaceous matter in the soil was rich in organic material.
3. The carbonaceous rock was formed from the compression of ancient plant material.
4. The carbonaceous asteroids in the asteroid belt are rich in minerals.
5. The carbonaceous chondrites are the most primitive meteorites known to science.