| Answer | Crossword Clue |
|---|---|
| lignites | LIGNITE, a type of coal |
| lignitic | pertaining to lignite (a type of coal) |
| subbituminous | of, relating to, or being coal of lower rank than bituminous coal but higher than lignite |
| lignite | a type of coal |
| fusain | A crumbly, porous type of coal resembling wood charcoal, used in drawing |
| opencast | noting or pertaining to a type of surface mining in which coal and other flat-lying mineral deposits are removed by the excavation of long, narrow trenches |
