SEDIS - Thesaurus
lithotypes  | |
|---|---|
| NT | clarain |
| durain | |
| fusain | |
| vitrain | |
| RT | bituminous coal |
| coal | |
| humic coal | |
| macerals | |
| sapropelite | |
| SN | Visible bands in humic coals. Lithotypes for bituminous coal are vitrain, clarain, durain, and fusain; beds or bands of cannel and boghead coals (sapropelite) are sometimes included. Added to Thesaurus in 1998. |
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