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Hartley Colliery
Mill Pit
Account of the different Strata met with in sinking the Mill Pit, Hartley Colliery. Begun October 16th, 1830
Shaft Details
Sunk: 16 Oct 1830
Approximate surface level 111 feet above sea (Ordnance datum)
Switch to measurements in:
fathoms, feet & inches, or metres


 

 
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|
| Geology encountered |
Thickness |
|
Depth |
| |
ft. |
in. |
|
ft. |
in. |
| Outset |
12 |
4 |
|
12 |
4 |
| Soil |
1 |
6 |
|
13 |
10 |
| Clay and sand |
13 |
0 |
|
26 |
10 |
| COAL |
2 |
0 |
|
28 |
10 |
| Thill |
1 |
0 |
|
29 |
10 |
| Grey metal stone |
6 |
6 |
|
36 |
4 |
| Post girdles |
1 |
6 |
|
37 |
10 |
| Grey metal stone, with post girdles |
6 |
0 |
|
43 |
10 |
| White Post |
3 |
0 |
|
46 |
10 |
| Whin |
0 |
4 |
|
47 |
2 |
| White post |
4 |
8 |
|
51 |
10 |
| Grey metal stone |
0 |
6 |
|
52 |
4 |
| Strong white post |
4 |
0 |
|
56 |
4 |
| Grey metal stone |
15 |
6 |
|
71 |
10 |
| COAL, with metal bands |
2 |
2 |
|
74 |
0 |
| Thill |
3 |
0 |
|
77 |
0 |
| Grey metal stone |
4 |
0 |
|
81 |
0 |
| Post, with grey metal stone partings |
9 |
0 |
|
90 |
0 |
| Post, with grey metal stone partings |
13 |
2 |
|
103 |
2 |
| Grey metal stone |
3 |
6 |
|
106 |
8 |
| COAL |
3 |
4 |
|
110 |
0 |
| Thill |
1 |
6 |
|
111 |
6 |
| Grey metal stone |
1 |
1 |
|
112 |
7 |
| White post, with girdles |
2 |
11 |
|
115 |
6 |
| Blue metal partings |
0 |
3 |
|
115 |
9 |
| Post |
2 |
3 |
|
118 |
0 |
| Dark blue metal, with ironstone |
0 |
5 |
|
118 |
5 |
| COAL, ground |
1 |
3 |
|
119 |
8 |
| Thill |
1 |
9 |
|
121 |
5 |
| Grey metal |
8 |
5 |
|
129 |
10 |
| Blue metal, with ironstone girdles |
10 |
9 |
|
140 |
7 |
| Black stone |
1 |
3 |
|
141 |
10 |
| Clay parting |
0 |
1 |
|
141 |
11 |
| Soft grey metal |
1 |
5 |
|
143 |
4 |
| Black stone |
1 |
0 |
|
144 |
4 |
| COAL, with metal bands |
0 |
6 |
|
144 |
10 |
| Soft thill |
4 |
6 |
|
149 |
4 |
| Blue and grey metal, with whin balls (about 1 stroke per minute to here, 12 in. barrel) |
13 |
10 |
|
163 |
2 |
| Post or granite (6 fathoms of which is exceedingly hard and porous, with gullets, where strong feeders of water were got; various feeders were wedged hack, sometimes amounting to 800 gallons per minute ; 7 fathoms of metal). |
0 |
0 |
|
163 |
2 |
| Tubbing put in |
66 |
6 |
|
229 |
8 |
| Grey metal, with post girdles |
2 |
9 |
|
232 |
5 |
| White post |
1 |
4 |
|
233 |
9 |
| Grey metal, with post girdles |
5 |
2 |
|
238 |
11 |
| Dark grey metal, with ironstone girdles |
7 |
2 |
|
246 |
1 |
| White post |
1 |
6 |
|
247 |
7 |
| Grey metal, with post girdles |
7 |
3 |
|
254 |
10 |
| COAL |
5 |
1 |
|
259 |
11 |
| COAL |
1 |
7 |
|
|
|
| Dark grey metal band |
1 |
7 |
|
|
|
| COAL |
1 |
11 |
|
|
|
| Grey metal, with post girdles |
11 |
6 |
|
271 |
5 |
| White post |
1 |
6 |
|
272 |
11 |
| Grey whin |
0 |
10 |
|
273 |
9 |
| Brown whin |
2 |
6 |
|
276 |
3 |
| Grey metal, with post girdles |
3 |
4 |
|
279 |
7 |
| Dark grey metal, with ironstone girdles |
5 |
4 |
|
284 |
11 |
| Post girdles |
0 |
6 |
|
285 |
5 |
| Dark grey metal |
4 |
10 |
|
290 |
3 |
| Mussel scalp |
0 |
3 |
|
290 |
6 |
| Dark grey metal |
6 |
0 |
|
296 |
6 |
| White girdle (a little water.) |
0 |
7 |
|
297 |
1 |
| Grey metal |
4 |
2 |
|
301 |
3 |
| Post girdle |
0 |
10 |
|
302 |
1 |
| Grey metal, with ironstone girdles |
10 |
0 |
|
312 |
1 |
| Black stone |
0 |
9 |
|
312 |
10 |
| COAL - Main Coal Seam (water to here about 100 gallons per minute) |
4 |
6 |
|
317 |
4 |
| Thill |
0 |
3 |
|
317 |
7 |
| COAL, ground |
2 |
1 |
|
319 |
8 |
| Grey metal |
0 |
8 |
|
320 |
4 |
| Post, with metal |
8 |
0 |
|
328 |
4 |
| Bored further:— |
0 |
0 |
|
328 |
4 |
| Grey post |
9 |
11 |
|
338 |
3 |
| Dark grey metal, with post girdles |
27 |
3 |
|
365 |
6 |
| Grey metal |
2 |
9 |
|
368 |
3 |
| Dark grey metal, with post girdles |
10 |
0 |
|
378 |
3 |
| COAL, foul, mixed with bands (12 inclues black at top) |
6 |
0 |
|
384 |
3 |
| Grey metal thill |
6 |
9 |
|
391 |
0 |
| Grey post |
14 |
4 |
|
405 |
4 |
| Dark grey metal, with post girdles |
32 |
0 |
|
437 |
4 |
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Source: An Account of the strata of Northumberland & Durham as proved by Borings & Sinkings, Volume F-K, published by the North of England Institute of Mining & Mechanical Engineers, 1885
original entry for sinking/boring number 1069 in "An Account of the strata of Northumberland & Durham as proved by Borings & Sinkings, Volume F-K, published by the North of England Institute of Mining & Mechanical Engineers, 1885"
main page for Hartley Colliery
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