| SEACOAL | In the main, carboniferous deposit (3-4) |
| PERMIAN | The last period of the Palaeozoic era, between the Carboniferous and Triassic periods |
| JOGGINS | The ___ Fossil Cliffs in Nova Scotia hold numerous fossils from the Carboniferous Period, so much so that site is sometimes called "coal age Gal¡pagos." This location was designated a UNESCO Wo |
| DEVONIAN | Fourth period of the Palaeozoic geological era, between the Silurian and Carboniferous (8) |
| LAMPBLACK | Carboniferous pigment obtained from soot used in making printer's ink |
| SOOTY | Covered with carboniferous powder |
| DINANTIAN | Carboniferous insect Indian's excited about |
| COAL | Material that makes something carboniferous |
| DEEPSEA | &11Ac. In the main, the most profound individual (4-3,5) |
| TIDERIP | Current strip used in a stretch of broken water, in the main (4-3) |
| ASHHEAP | Pile of rubbish apparently includes 29, in the main (3-4) |
| SEALANE | Established route, in the main? (3,4) |
| MUDFLAT | Stretch of level ground, left saturated in the main (3-4) |
| SEAFRET | In the main, worry about a bank of fog (3-4) |
| SEAMIST | It cuts down visibility in the main (3,4) |
| SEALEGS | In the main you will get this ability (3-4) |
| SEALION | One taking pride in the main? (3,4) |
| SEASALT | Condiment found in the main (3,4) |
| SEABASS | Singer in the main? (3-4) |
| JETSKIS | These are motorbikes in the main, aren't they? (3,4) |
