GEOLOGY OF THE CAMPSIE HILLS. 33 



Its roof, or immediate covering in the stratifica- 

 tion, and its floor, or what it rests upon, consist 

 both of clay, with which the coal is much mixed, 

 and of course much contaminated. 



The general dip of the whole of the strata in 

 the Campsie Hills district, is to the south-east, 

 varying in different places from an angle of six- 

 teen, to one of thirty degrees. 



The following is a Table of the Strata as they 

 occur in the eastern part of the district at Mur- 

 ray's Hall, where the trap displays a perpendicu- 

 lar face, of from seventy to eighty feet ; and a 

 Table of the Strata near its western extremity, in 

 the vicinity of the village of Campsie, where the 

 coal is found in its greatest thickness. 



VOL. II. 



Two 



