222 Mr. Bubble's Synopsis of the Newcastle Coal Field. 



THE RYTON AND WALLBOTTLE DISTRICT 



Embraces the whole of the Coal-field west of the meridian of Newcas- 

 tle, on both sides of the Tyne, and north and west of the Derwent. 



A, B, C, D, E, F, G, H, I. All cropped out in this district. 



K. The Grand Lease-main Coal Seam lies through a considerable 

 portion of the district, immediately on the north side of the Main Dyke, 

 owing to the depression of the strata, by the Dyke. It varies much in 

 quality in the different parts of the district, but is mostly of inferior qua- 

 lity ; and in many parts it is very bad. It was found in the greatest 

 perfection in Stella Grand Lease, Crawcrook, and Rise-moor Collieries. 



L. The Crow Coal, not of workable quality and thickness. 



M. The Five-quarter Coal is of second-rate quality, and has been 

 wrought to a considerable extent in Stella Grand Lease, Crawcrook, 

 and Wylam Collieries. 



N. The Ruler Coal, not of workable thickness. 



O. Townley Main, Barlow Field, Upper Main, or Engine Seam, 

 is found through all the district ; has been extensively worked, and 

 yields coals of the best second-rate quality. 



P. The Stone Coal, Five-quarter Seam, or Main Coal, lies through 

 all the district, is nearly of uniform thickness, but varies in quality and 

 hardness. The coals rank in the second class. 



Q. The Under Five-quarter, called the Six-quarter Seam, at Wylam. 

 The coal is of good quality, but tender, and works small. 



R. The Three-quarter, or Yard Seam, has been worked in Grand 

 Lease and Wylam, but is not found, in a workable state in Walbottle. 



S. The Brockwell, Horsley Wood, or Splint Coal Seam, lies through 

 the whole district, yields coal of various qualities in different parts, and 

 has been extensively worked. This is supposed to be the lowest, or last, 

 workable seam, in the series. 



I 



