Mr. Buddle's Synopsis of the Newcastle Coal Field. 231 



it undulates so as to form many troughs or swellies. It is also very 

 much infested with balks, or ridges of stone, protruding through the 

 roof, and also with hitches. 



The Beaumont Seam also lies through the whole line. In the vicinity 

 of the Mill Pit it is rendered remarkable by a succession of nips, which 

 frequently press the Coal quite out. 



The whole series of the seams of Coal, from the High Main down- 

 wards, are found again on the north or dip side of the Main Dyke ; but 

 all of them are of diminished thickness, except the High and Low Main, 

 and the Beaumont. The continuation of these seams is shewn in Sec- 

 tion No. 3. 



The most remarkable feature in this (No. 23 Section, is the thick stra- 

 tum of Sandstone (about 20 fathoms), in which the Yard Coal Seam is 

 embedded. In Section No. 3, it will be seen that this Post begins to be 

 divided by a tongue of Metal Stone under the Town Moor. The upper 

 portion of this Post continues to the east into Wallsend Colliery, gra- 

 dually thinning in its progress till it forms the band of the Bensham 

 Seam, in the western part of Wallsend Colliery, and runs entirely out 

 under the meridian of Wallsend New Church. The lower division of 

 this Post continues, but of very diminished thickness, through the whole 

 extent of the section to North Shields. 



It is further to be remarked, that the same peculiar tendency of the 

 Sandstone beds, to thicken in ther progress westward, is found in the 

 strata below the Low Main as far as the Beaumont; but we have no 

 means of ascertaining whether this tendency continues downwards from 

 that seam to the Brockwell. 



There are no Slip Dykes on this line of Section, except such as come 

 under the denomination of hitches, which are much too small to be shewn 

 on this scale. 



SECTION No. 3, PLATE XXII. 



This Section commences at the Chirton Pit, in CoUingwood Main Col- 

 liery, as its eastern extremity, and terminates to the west at the Corona- 

 tion Pit, in Walbottle Colliery, the general line of direction being nearly 



VOL. I. I i 



