Floor or roof | Rock | Thickness (m) | Lithologic character |
Upper roof | Fine sandstone | 9.25 | Grey or dark grey; mainly feldspar and quartz; compact |
Immediate roof | Mudstone | 2.33 | Dark grey; slightly silty; with abundant plant fossils |
| Coal seam 10 | 3.2 | Black; fragmental; showing glassy luster; mainly dull and bright coal |
Immediate floor | Mudstone | 2.00 | Dark grey ~ ash black; in bulks; containing fragments of plant fossils |
Hard floor | Fine sandstone | 8.90 | Grey; fine-grained; mainly composed of quartz and feldspar |