Section of the Strata at Howden Pit. Percy Main Colllery.
(Bored from the High Main Coal No. 9.)
| Fs. | Ft. | In. | Fs. | Ft. | In. | ||||
| Outset | ─ | 4 | 8 | Brought forward | 80 | 5 | 6 | ||
| Surface | 1 | ─ | ─ | Blue metal with Whin girdles | 1 | ─ | ─ | ||
| Brown clay | 1 | ─ | ─ | Grey metal stone with whin girdles | 1 | 2 | ─ | ||
| Leafy clay | 1 | 5 | ─ | Whin stone | ─ | 1 | 6 | ||
| Bluish gravelly soil | 4 | ─ | 6 | Grey Metal with post girdles | ─ | 4 | 6 | ||
| Brown leafy clay | 1 | 2 | ─ | Grey metal | ─ | 2 | 4 | ||
| Sand, gravel and water | ─ | 3 | ─ | 5 | Coal | ─ | 1 | 2 | |
| Blue gravelly clay | 6 | ─ | ─ | Thil | ─ | 3 | ─ | ||
| Sand and gravel clay with water | 2 | ─ | ─ | Grey metal with Whin girdles | ─ | 4 | ─ | ||
| Sand, gravel and water | 3 | 4 | 6 | Grey metal stone | 1 | 3 | ─ | ||
| ─────── | Post and Whin girdles | 1 | 1 | ─ | |||||
| Alluvial | 22 | 1 | 8 | Grey metal stone | 1 | 4 | ─ | ||
| 1 | Coal | ─ | ─ | 2 | Blue stone | ─ | 2 | ─ | |
| Grey metal | ─ | ─ | 2 | 6 | Coal | ─ | 1 | 2 | |
| 2 | Coal | ─ | ─ | 11 | Grey metal stone | 1 | 4 | ─ | |
| Thil | ─ | 4 | ─ | White post | 8 | 3 | ─ | ||
| Grey metal with post girdles and water. Alternate beds of slate and sandstone | 3 | 2 | 9 | Grey metal stone | ─ | 2 | ─ | ||
| Black stone (Clay stone) | ─ | 4 | ─ | 7 | Coal | ─ | ─ | 10 | |
| Blue stone with water | ─ | 3 | 6 | Grey metal | 1 | 2 | ─ | ||
| Grey Thil | ─ | 5 | 6 | Blue stone | ─ | 4 | ─ | ||
| Grey Metal stone with water | 4 | 5 | 6 | Grey metal stone | 1 | 4 | ─ | ||
| Skamy grey post with water | 5 | 2 | ─ | White post | 9 | 1 | ─ | ||
| White post with water | 10 | ─ | 4 | Grey Metal stone with post clyers | ─ | 3 | ─ | ||
| Grey metal | ─ | 4 | ─ | White post with water | 2 | ─ | ─ | ||
| White post | 1 | 1 | ─ | Black stone | ─ | 3 | ─ | ||
| Grey metal | 1 | 3 | ─ | Blue stone | ─ | 2 | ─ | ||
| Black stone | 1 | ─ | ─ | Grey post | ─ | 3 | ─ | ||
| Grey Thil | ─ | 5 | ─ | Blue stone | ─ | 3 | ─ | ||
| Grey metal with whin girdles | 3 | 1 | ─ | Grey metal stone | ─ | 4 | ─ | ||
| Blue metal | ─ | 2 | ─ | Black stone | ─ | 2 | 6 | ||
| Red metal | ─ | 5 | ─ | Post with grey Metal girdles | 1 | ─ | 2 | ||
| White post with water | 7 | 5 | ─ | Dark blue Metal stone | 2 | 3 | ─ | ||
| Red metal stone | ─ | 5 | ─ | 8 | Coal | ─ | ─ | 4 | |
| Grey metal stone with Whin girdles | 1 | ─ | ─ | Grey Thil | ─ | 2 | ─ | ||
| Grey Thil | ─ | 4 | 6 | Grey post | ─ | 2 | ─ | ||
| Black stone | ─ | 1 | 6 | Main post | 10 | 4 | ─ | ||
| Grey metal with Whin girdles | 1 | 2 | 6 | 9 | Coal, high main | 1 | ─ | 6 | |
| Blue stone | ─ | 4 | ─ | Thil, foul coal, grey metal and Coal | ─ | 5 | 9 | ||
| 3 | Coal | ─ | ─ | 6 | Blue stone with girdles | 3 | 1 | 6 | |
| Grey metal | ─ | 1 | 6 | Grey metal | 2 | ─ | ─ | ||
| 4 | Coal | ─ | 1 | ─ | Grey post | 1 | 2 | ─ | |
| Grey Thil | 1 | ─ | ─ | Grey metal with girdles | 1 | 2 | 9 | ||
| Grey metal with post girdles | 5 | 3 | 6 | 10 | Coal | ─ | 2 | ─ | |
| Blue stone | 1 | ─ | ─ | ─ | ─ | ─ | |||
| Grey Metal stone with Whin girdles | 1 | ─ | ─ | ─ | ─ | ─ | |||
| ─────── | ─────── | ||||||||
| Carried forward | 80 | 5 | 6 | Fathoms | 145 | ─ | 6 | ||
