Mr. N. Wood on the Geology of Northumberland, ^c. 309 



grit rocks, very flat and undulatory, and in most places covered at high 

 water. 



At Bent Hall, about half a mile south of Beadnel, a thick bed of very 

 hard yellow Limestone puts in, stretching out of a small bay about half 

 a mile into the sea, rising north 7°, line of direction N. 80 E. The 

 north face of this bed is about 30 feet thick, overlying Shiver 10 feet 

 thick. These are succeeded by numerous beds of Limestone, Sand- 

 stone, and Shale ; alternating as exhibited in Section, Plate XXVL These 

 strata constitute the great central deposit of Limestone ; the following 

 being an enumeration of the different beds. 



Feet. 

 Yellow Limestone (as above), ... ... ... ... 30 



Shiver, or Bituminous Shale, ... ... ... ... 10 



Yellow Limestone, ... ... ... ... ... ... 15 



Alternating beds of very coarse Gritstone and Hazel, ... 30 



Beds of soft Plate, ... 8 



Bed, or series of layers of very hard black Limestone, 



containing Shells, 35 



Yellow Limestone, ... ... ... ... ... 8 



Coarse Hazle, gritty at top, ... ... ... ... 20 



Black Plate, or Shale, ... ... ... ... ... — 



A Whin or Basaltic Dyke, here passes through the beds, at right 

 angles to the line of stratification, varying in width from 25 to 30 

 feet, course S. 66i E., dip N. 82°. The inclination of the beds being 

 8° S., direction N. 85 E. This Dyke does not displace the parallelism of 

 the beds, but produces the same effect upon the Shale, &c. as similar 

 Basaltic Dykes.— For a more particular description of this Dyke see 

 Geological Transactions, vol. iv. part 2. 



Feet. 

 Black Limestone, ... ... ... ... ... ,,. g 



Coal, 1 



Black Shiver, 20 to 30 



Various beds of Slaty and compact Hazles, 40 



Black Limestone, 4i 



Bed of Coal, ... ... ... ... ... ... 



Black Plate, 5 



