SPENCER : THE HALIFAX COAL STRATA. 
303 
weight of materials brought into the area, pressing down the 
yielding crust of the earth ; occasionally pauses in the subsidence 
took place, followed by slight elevations into land surfaces. 
Table of the Halifax Coal Strata. 
.3. 
4. 
5. 
6. 
7. 
8. 
9. 
10. 
11. 
12. 
13. 
U. 
15. 
16. 
17. 
18. 
19. 
20. 
21. 
70 ft. to 150 ft. 
100 ft. to 150 ft. 
... 2 ft. 3 in. 
Flagrock of Northowram and Elland ... 
Shales and Raggystone ... 
80 yds. Band Coal and Seat-earth 
Strata, including 60 yds. Band Stone and 
"Quarrel" Rock 
48 yds. Band Coal 
48 yds. Band Stone 
Shales 
36 yds. Band Coal 
Shales and Bind and 36 yds. Rock 
Shales with "Baum pots" and Marine 
Shells, Goniatites, Nautili, Aviculo- 
pectens, &c. ... 
Pecten Bed, Aviculopectens, ttc. 
Hard Bed Coal, with Coal Balls 
Gannister Rock and Seat-earth ... 
Shales 
Middle Band Coal 
,, „ Seat-earth 
„ „ Stone 
Shales, containing beds of Anthracosia 
and Spirorbis 
Soft Bed Coal 1 ft. 
Seat-earth ... ... ... ... 2 ft. 0 in. j 
Low Bed Stone (Soft Bed Flags) ... 12 ft. to 20 ft. 
Shales 40 ft. to 50 ft. 
Thin Coal 3 in. to 8 in. 
Seat-earth 4 ft. to 6 ft. 
Rough Rock. 
The total thickness of the above series is in this district about 
€00 ft. 
100 ft. 
Sin. 
6 ft. to 12 ft. 
28 ft. 
Sin. 
98 ft. 
9 ft. 
6 in. 
2 ft. 3 in. 
4 ft. 
28 ft. 
, ''y, 3 ft. 10 in. 
2 ft. to 3 ft.j 
about 3 ft. to 5 ft. 
30 ft. to 40 ft. 
4 in. ^ 
3 ft. 4 in. 
