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



further, an upcast of 5 fathoms, which is the last dislocation of any con- 

 sequence we know of until we arrive at the Main Dyke. The Main 

 Dyke, at this point, is assumed to be about 90 fathoms. The strata on 

 the dip side of the Dyke are drawn from the sinkings and borings in 

 Montagu Main Colliery, and from the sinking account of the Corona- 

 tion Pit at Walbottle. But as there are no intermediate borings the 

 strata are projected on the Section by drawing the lines between the 

 two points. 



SECTION No. 4, PLATE XXIII. 



The line of this Section commences at about 400 yards to the east of 

 the St. Hilda or South Shields new Engine Pit, and about three quar- 

 ters of a mile from the sea. It passes through the old Engine Pit, at 

 the west end of South Shields, along the north side of Jarrow Slake to 

 Jarrow Pit. From this pit, it passes through the Hebburn B and C 

 Pits, crosses through the river obliquely to the King Pit at Walker 

 (where Messrs. Losh and Co.'s soda works are erected), then passes 

 through St. Anthony's CoUiery, and re-crosses the river to the Venture 

 Pit, at Felling. From here it runs direct to the Isabella Pit on Gates- 

 head Fell, passing through Felling Colliery. It then changes its direc- 

 tion, and passing through the Sheriff-hill Engine Pit at Low Fell, ter- 

 minates at the Team. At a future period, it is intended to continue 

 this section through Blackburn Fell, Marley Hill, and Tanfield Moor 

 to Pontop Pike. 



The deepest part of this section is under Jarrow Slake, where 

 we have the High Main Coal at 152 fathoms, and the Low Main 

 at 215, below the sea-level high water mark. At this point we 

 have all the strata proved, except about 30 fathoms under the bed of 

 the Slake. Here we have the Grindstone Post, the '^0-fathom Post, 

 the Main Post, the Metal Coat Post, the Yard Coal Post, and the Post 

 lying above the Loud Main Coal, all well defined. We have also, owing 

 to the great depth here, three strata of Sandstone, for which we have 

 no names, as they crop out in South Shields and Hebburn, and, conse- 

 quently, can not be found on any other part of the line. These extra 

 strata are described in the reference to Section No. 1, but the two lower 



