Mr. N. Wood on the Geology of Northumberland, S^c. 311 



Feet. 



Slaty Sandstone and beds of Plate, 20 



Thin bed of Shelly Limestone, ... ... ... ... — 



Blue Limestone (quarried), 10 to 15 



Clayey Parting, ... ... ... ... ... ... 2 



Blue Limestone, ... ... ... ... ... ••• 13 



Plate, 4. 



Slaty, or Micaceous Sandstone, ... ... ... ... 20 



Hard yellow Limestone, ... ... ... ... ... 5 



Black Shivery Plate, 10 



Thick bed of red gritty Sandstone, with alternating 



beds of Plate, 40 to 50 



Coal and Shale, 4 



From Beadnel the general rise of the beds is north, except where 

 disturbed by the occurrence of SHp Dykes ; but here a great change 

 takes place ; a bed of very coarse Red Sandstone puts in, underlying 

 the preceding enumerated beds, which at first rises north, then gra. 

 dually becomes more flat, and ultimately dips north about 1 in 12, 

 towards the pier at North Sunderland. 



This bed apparently stretches across the harbour, where some great 

 Slip Dykes again occur ; the beds where exposed, exhibiting a contrary 

 dip to those from Beadnel, presenting the faces to the south, and dipping 

 rapidly north. 



This inclination of the beds continues, until the Whin or Basalt is 

 again exposed, forming a ridge of low and flat rocks, covered at high 

 water. That it is a bed of Basalt, occupying a position in, or about, the 

 same part of the series, as the Whin of Dunstanburgh, is shewn by the 

 beds of Limestone, which, from Beadnel, rise up from underneath the 

 Basalt, taking a contrary inclination at Sunderland, and again dipping 

 underneath this bed of Basalt. 



After an interval of sandy beach of about half a mile, we reach Bam- 

 burgh, where we find the Basalt forming a high mount, on which the 

 castle stands. The Basalt is here of great thickness, and presents on 

 the north side an escarpment near 1 00 feet high. It rests upon a bed 

 of Sandstone, which is much contorted, and affected by contact with 

 the Basalt. 



