1853,] Report on the Geological Structure of the Salt Mange. 273 



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be seen in the shales. The masses 

 of coal are generally compressed, 

 and are evidently portions of the 

 trunks and branches of trees, the 

 point of junction of the former 

 with the latter being often ap- 

 parent. 



Though distributed throughout 

 all the shale beds, the coal occurs 

 most abundantly in one of these, 

 which is from six to eight feet 

 thick, and is enclosed between 

 beds of yellow sandstone,in which 

 masses of the coal also occur. It 

 has for the last two years been 

 chiefly obtained from the shale- 

 bed at a point where owing to 

 a fracture and upheaval of the 

 strata, a portion of them have 

 been thrown into a nearly vertical- 

 position, as represented in the 

 annexed rough sketch. 



Line of section from north to 

 south distance about 1 mile. 



1 Conglomerate, soft sandstone 

 and red clays. 



2 Nummulite limestone and 

 alum shales. 



3 (A.) Belemnite shales (B.) 

 cherty limestones. 



(C.) Quartzose sandstones and 

 grits with beds of bituminous 

 shales. 



3 A., 2 A. and 1 A. The same 

 beds in reversed order. 



By digging a succession of holes 

 at different heights in the verti- 

 cal shale-bed, the masses of coal 

 are obtained with much greater 

 ease, than where the bed in a 



