Poor-quality, brown coal with a visibly woody structure, relatively unaltered, between peat and bituminous coal in rank. It is non-coking, burns with a long, smoky flame, and contains up to 40% moisture when mined, although this can be reduced to 10–15% by drying in air. It is found in Palaeogene basins in Britain, and also in continental Europe where it is economically important.