234 



The Irish Naturahst, 



November, 



UN A SKCTION OF THE LOWER COAL MEAvSUREvS AT 

 EMERALD PIT, DUNGANNON. 



BY H. BOI^TON, F.R.S.K., F.G.S. 



A shaft was sunk iu 1894-5 some little distauce to the north of the old 

 Druniglass Colliery, and was carried to a depth of 197 yards, penetrating 

 five coal-seams before reaching the Main Coal, which was known to the 

 miners as the " Congo "' seam. During the course of the sinking a 

 measured section was obtained of the strata passed through, and a col- 

 lection of fossils brought together. After work had commenced on the 

 deeper coal-seams, water broke into the colliery on two occasions, 

 causing its abandonment. A generalised section of the measures passed 

 through is as follows : — 



Down to the level of the 4th coal, the strata consisted mainly of red, 

 yellow, and gre}- sandstones, with grey bind partings. Below the 4th 

 coal, black and grey shales predominated. At a depth of 133 yards from 

 the surface occurred a black shale containing a typical lower coal 

 measures Marine Fauna. 



The following species have been determined : — 



Brachiopoda — 



Discina nitida. 

 Lingula sqiianiifonnis, 

 Spirifera trigonalis. 

 Cainarophoria isorhyncha ? 

 Choneles^ sp. 

 PPXKCYPODA— 



Sanguinolitcs plicalus, Portlock. 

 Nttcula gibbosa, 

 Nnculana attenuata. 

 Protoschizodiis axiniforniis. 

 Parallelodon^ cf. Verneiiilliamis de 

 Kon. 



Gasteropoda— 



Pkuroioniaria^ cf. geiiuiinlifcra, 



CKPHAI.OPODA— 



Ortlioccras koninckianiiiii ? d'Orb. 



Vermes— 



Serpulites viembranaccns. 



Fishes— 



Palseouiscid scale and tooth. 



