284 Mr. George Tate's Miscellanea Oeologica. 



Sanguinolites iridoines, and sulcatus, Cardiomorpha ohlonga, 

 &c. Of limestones there are upwards of twenty different 

 sills, from 1 foot to 30 feet in thickness, and having an aggre- 

 gate thickness of more than 200 feet ; this division might, 

 therefore, be designated Calcareous. 



The lotoer division, from the base of the Dun Limestone to 

 the top of the Tuedian group, has a thickness of about 900 

 feet ; and it is especially marked by the number, thickness, 

 and quality of its coal seams. Here we have the following 

 eight seams of workable coal, in descending order ; viz., the 

 Fawcet or Falset Coal, about 40 feet below the Dun Lime- 

 stone, is from 18 inches to 3 feet 4 inches thick ; the Scremer- 

 ston Main Coal is from 2 feet to 4 feet thick ; the Stoney 

 Coal is from 1 foot to 3 feet 6 inches thick, but of poor quality; 

 the Main or Cancer Coal is from 2 feet to 7 feet ; the Three- 

 quarter Coal, of inferior quality, is from 2 feet to 4 feet ; the 

 Cooper or Cowper Eye Coal, one of the best for domestic use, 

 is from 17 inches to 3 feet ; and the Wester Coal from 3 feet 

 to 4 feet 6 inches thick. There are a few limestones in this 

 division"; but they are thin and generally impure, and the 

 aggregate thickness is only about ^0 feet. To this division 

 we may give the distinctive name of Carbonaceous. Some of 

 the Marine organisms of the Calcareous division are extended 

 into this ; but they are few in number. In the shale beds 

 there are remains of ganoid fish, accompanied by Myophoria, 

 Anthrocomya, Aviculo-pecten, Entomostraca, and Lingula 

 squamiformis, forms generally associated with coal seams. 

 The marine conditions, so marked in the Calcareous division, 

 appear dying out ; and there is an approximation to those 

 which prevailed when the upper coal measures were deposited. 



To this Carbonaceous division, the strata around Egling- 

 ham belong, but much dislocated by faults; the great sand- 

 stone beds, belonging to the formation, have been thrown up 

 into high hills and long ridges, rising about Eglingham and 

 Bewick, from 400 to more than 800 feet above the sea level, 

 the highest point in the range being E-oss Castle, which 

 reaches an elevation of 1000 feet. From these disturbing 

 causes, the coal seams are not so productive in this district as 

 in the more northern portions of the field. At Tarry and at 

 Bannamoor, both near Eglingham, two coal seams have been 

 worked. The following is a section of the Bannamoor pit : — 



ft. in. 



Red Clay , , , , ,50 



Yellow Sandstone , , , , ^0 



