302 Mr. N. Wood on the Geology of Northumberland, ^c. 



No. XXVIII. — On the Geology of a Part of Northumberland and Cttm- 

 berlajid. — By Mr. Nicholas Wood, Killingworth. 



Read, April 18, 1831. 



The great Coal deposit of Durham, and the south-eastern part of 

 Northumberland, is that which is generally denominated the "Inde- 

 pendent Coal Fokmation." The following being the order of super- 

 position : — 



No. 1. 

 Magnesian Limestone, underlaid by a bed of Yellow Sand, and 

 Red Sandstone. 

 Reposing unconformably upon : — 



No. 2. 

 Coal Measures, 

 Millstone Grit and Shale, 

 Mountain or Carboniferous Limestone, 

 Old Red Sandstone. 



This arrangement is faithfully exhibited in the Geology of the dis- 

 trict, the subject of this paper, in which it will be attempted to de- 

 scribe the successive cropping out of the second class of strata, from 

 underneath the former, along the eastern coast of Northumberland, 

 from the river Tyne to the Tweed ; and again at right angles to that 

 line, or from the sea at Tynemouth, to the New Red Sandstone Plain of 

 Carlisle. 



Independently, however, of the interest necessarily attaching to a 

 correct record, of the locality and order of super-position of the several 

 sub-divisions of the above series, there are some peculiarities incident to 



