the country formerly called Killingworth moor, and passing near Gosforth church, Denton hall, and by the north corner of the field east of W. Denton's house, crosses the Tyne in the direction of Reyton church, and proceeds to the south-west by Greenside and Lead-gate. Farther it has not been traced; but it is highly probable that it traverses the lead mine district; and produces lateral and valuable metalliferous veins therein.
It will appear from the two subjoined sections of Montagu Colliery, taken from opposite sides of this fissure, that 11 seams of coal (two of which are worth working) together with their accompanying strata which are found on the northern side, have disappeared on the southern. The exact throw in the measures occasioned by the dyke cannot be ascertained from these sections, one of them being that of a pit near to Scott's wood close to the Tyne, the other belonging to a shaft sunk in much higher ground 1 mile north of the former.
[1]The hade of the dyke in this colliery is imperceptible: the space between the cheeks measures about 22 yards, and is filled with soft and hard sandstone. A perpendicular fissure, the sides of which are quite smooth, divides the stony contents of the dyke into two equal parts, and when perforated was found to be filled with soft clay and water. On the south side the coal-measures preserve their usual dip of 5° until close to the dyke: on the northern from the distance of 150 yards they rise to the dyke at an angle of 20°, but at the distance of 600 yards they regain their accustomed position. In some parts the coal is deteriorated in quality to the
- ↑ I have extracted these particulars from a memoir on the Montagu colliery, by Mr. Thomas, of Denton, in which are described the dykes and slips met with in the workings at that mine. I am partly indebted to the same gentleman for the information on the direction of the main dyke.
