each, namely, the Dudley Port Trough faults for the large scale, and a small pair of faults in the Victoria colliery. West Bromwich, for the other.
The Dudley Port Trough faults are shown in the section given in this volume (a reduction from No. 7, sheet 25, of the Horizontal sections), and their general form is reproduced in Fig. 28. They have previously been described (p. 164), to which the reader is requested to refer.
Mr. H. Johnson of Dudley, in the year 1849, showed me in his office a carefully-executed drawing of a singular appearance he had observed in the Thick coal in one of the gate-roads of the Victoria colliery at West Bromwich. At this spot the lower beds of the Thick coal were apparently unbroken and regular, but in the three upper beds there was a trough-shaped gap, eight feet wide at bottom and fifteen feet wide at top, in which reposed a corresponding mass of the beds that on either side lay on the topmost bed of the Thick coal. This gap in the coal gradually, descended in one direction till it reached the bottom of the Thick coal, and assumed the form represented in the following figure:—
Fig. 26.
Scale, 1 inch equal to 20 feet
| A. Trough-shaped gap in the Thick coal. | |||
| B. and C. The Thick coal. | |||
| 1. | Shale and clunch above the Thick coal, containing some bands of ironstone nodules. | ||
| 2. | A black batt (bituminous shale). | ||
| 3. | Roof's. | Thick coal. | |
| 4. | Top slipper. | ||
| 5. | White coal. | ||
| 6. | Lambs. | ||
| 7. | Tow coal. | ||
| 8. | Brazil. | ||
| 9. | Foot coal. | ||
| 10. | Hard stone parting. | ||
| 11. | Stone coal. | ||
| 12. | Sawyer and slipper. | ||
| 13. | Bench batt. | ||
| 14. | Benches coal. | ||
