TRIASSIC STRATA OF CUMBERLAND AND DUMFRIES. 361 



Thickness. 

 faths. ft. in. 



At 23 Three-quarter coal 3 6 



„ 40 Main coal » 6 o 



,, 54 Nine-feet seam 9 o 



" 552 Three-feet seam, sunk to in engine- 



pit 3 o 



„ 65^ Five and a half feet 5 6 



„ 76I Five feet 5 o 



,, 79 Seven feet 7 o 



,, 82 Three feet 3 o 



" The ancient workings of the colliery were at Byreburn, 

 to the north-eastward of the present colliery, upon a lower 

 series of coals there cropping out, viz. a seam of 6 feet, 

 another of 3 feet 8 inches, and a third of 2 feet 4 inches, all 

 of which seams undoubtedly underlie those of the present 

 colliery, 



*^^ At about 190 yards south-east of the (Canobie) engine- 

 pit, this coal-field is interrupted by a downcast brow of red 

 sandstone ; and on the east side the coal terminates at the 

 mountain limestone. '^ 



Copies of the above bores are given to show what in- 

 formation has been obtained in the searches for coal. The 

 strata gone through are not very easily recognizable from 

 the journals, but they both appear to me to have been 

 made in the same neighbourhood, and to be wholly through 

 upper coal-measures, most probably under the Knotty Holm 

 sandstone, as the arenaceous beds found in the upper por- 

 tions of both of them bear some resemblance to that rock. 

 The thin bed of Spirorbis limestone is not noticed. The 

 beds of limestone alluded to are like the calcareous beds 

 seen in the lower portions of the upper coal-field in the 

 Esk, at Canobie, before we reach the fault which brings in 

 the profitable part of the Duke of Buccleuch's coal-field. 

 The parties, as Mr. Dunn states, considered the last-named 

 bore to be unsatisfactory, probably because no coal-seams 

 were found ; but if the Canobie and Penton upper coal- 



2b2 



