Geology of Northumberland and Durham, 203 



Brought forward 



Low main coal seam, on the Wear, or Five- 1 

 quarter coal seam, on the Tyne J 



White post i 



Whin 



Gray metal with post girdles 



Black and blue metal stone 



Coal 



Gray metal with post girdles 



Coal O y -O ft -4 5n 



Band If 



Coal 7 



Thill 110 



Strong gray metal 



Gray post 



Black metal 



Blue metal with post girdles 



Strong white post 



Gray metal and post girdles 



Section of the Hutton coal seam, on the 

 Wear, or Low main coal seam, on the Tyne. 



Coal lM^'^ 



Band 3| 



Bottom Coal (coarse) 13 



Fa.Yds.Ft.In- 

 120 2 2 



9 1 1 11 



5 116 



11 2 9j 

 147 2 4| 



Total depth to the Hutton seam, or Low ^ 

 main seam of the collieries on the Tyne J 



The colliery, or rather the three collieries, in the neighbour- 

 hood of Hetton in the county of Durham, is at present the 

 most important mining concern in this coal-field. These pits 

 are said to be capable of working two hundred thousand New- 

 castle chaldrons of coals annually: they are situated about 

 seven miles from Sunderland, to the south-west, and the shafts 

 are sunk through the magnesian limestone, which here covers 

 the coal-measures. The following extract of a letter from a 

 professional man, on the subject of these mines, is worthy of 

 insertion. 



" A bed of soft sandstone # was found under the magnesian 

 limestone, abounding with water, in the Hetton and Elemore 

 Pits; but at Eppleton sinking, no water was met with till near 

 the bottom of the sandstone. It may be remarked that at the 

 Hetton Pits there is twenty-six fathoms of limestone, and only 

 four feet four inches of sandstone; at Elemore twelve and a 



* This is the soft yellow sandstone which intervenes between the mag- 

 nesian limestone and the coal .measures, so ably described by Prof. Sedgwick 

 in the Geological Transactions, in his papers on the subject read in 1826, 

 1827 and 1828. [Abstracts of these papers were given in the Phil. Mag. 

 and Annals, N.S. vol. i. p. 66, and vol.iii. p. 301.— Edit.] 



2D2 



