383 
THE GEOLOGIST. 
the north we hare, at Castle Eden Colliery, the coal-measures orerlaid by 
the Permian ; and at Oughton Colliery, nearer to the Tees, the Trias has 
been bored into some 500 feet ; the Hutton coal-seam, at Castle Eden 
Colliery, being some 750 feet below the sea-level, and the salt at Mid- 
dlesbro' about 1250 feet ; on the south side of the Tees the Lower Lias 
puts on and is capped by the Upper Lias and Oolitic strata — these strata 
dipping both to the south and north from the Tees. The following is an 
account of the strata sunk and bored through : — 
No. Fm. ft. in. 
1. Made ground (slag, chalk, etc.) 15 0 
2. Dry slime or river mud 120 
3. Sand with water 140 
4. Hard clay (dry) 140 
5. Red sand with a little water 010 
6. Loomv sand with a little water 0 3 0 
7. Hard clay (dry) 2 ? 0 
8. Rock, mixed with clay and water 15 0 
9. Rock, mixed \\'ith clay (dry) 010 
10. Rock, mixed with gypsum (dry) 10 0 
11. Gypsum with water 020 
12. Red sandstone with small veins of gypsum and water .910 
13. Gypsum rock (dry) * 100 
14. Brown shale with water 010 
15. Red sandstone 040 
16. Do. with small veins of gypsum and water ... 2 0 0 
17. Blue poststone with water at bottom 0 3 0 
18. Red sandstone with water 310 
Bottom of sinking 29 4 0 
19. Redstone 72 5 4 
20. Red and white sandstone 016 
21. Red sandstone 3557 
22. Do. and clay 010 
23. Red sandstone 843 
24. Do. and clay 13 0 
25. Do 11 0 5 
26. Strong clay 029 
27. Red sandstone and clay 016 
28. Do 4 3 5 
29. Do. and clay 130 
30. Do. with a vein of blue rock 1^ thick at 1005 feet .814 
31. Red and blue sandstone 015 
32. Red sandstone 100 
33. Do. and thin veins of gypsum 0 15 
34. Do. do 6 3 8 
35. Red sandstone, blue clay, and gypsum • 0 12 
36. Do. with veins of gypsum 14 3 3 
37. Gypsum 032 
38. White stone 008 
39. Limestone 028 
40. Blue rock 002 
41. Blue clay 002 
42. Hard blue and red rock 0 0 10 
43. White stone 027 
44. Dark red rock 012 
45. Dark red rock, rather salt 067 
46. Salt rock, rather dark (1) 2 0 7 
47. Do. very dark (2) 0 4 1 
