464 Notices of Memoirs — H. Bolton — Coal-measures, Dungannon. 



confirmation from areas much further Avest, and it is clear that both 

 the Cretaceous and Eocene seas extended to an unknown distance in 

 that direction, though we can trace their boundaries fairly on the 

 north-west. Many of the flints of southern Ireland may have been 

 derived from local strata rather than from ice-borne drift. 



IV. — On a Section of the Lower Coal-measdkes at Emerald Pit, 

 Dungannon."' By H. Bolton, F.R.S.E., F.G.S. 



A SHAFT was sunk in 1894-5 some little distance to the north of 

 the old Drumglass 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 collection 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 : — 



yds. ft. in. 

 Strata 46 2 7 



1. Coal (inferior) 1 10 



Strata 3 2 2^ 



2. Coal 1 



Strata 65 2 3" 



3. Coal (in thin partingfs with shale) . . .205 



Strata . . ' 44 11 



4. Coal 3 



Strata 25 5 



It. in. 



(Top Coal 1 0^ 



Brown Shale 7 



Coal 13V. . . . 1 10 



Inferior Coal 3 I 



Coal 9J 



Strata 5 6 



6. Coal 3 3 



Down to the level of the fourth coal, the strata consisted mainly of 

 red, yellow, and grey sandstones, with grey bind partings. Below 

 the fourth 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. GASTEROrODA. 



Discina nitida. Pleurotomaria cf. gemmuUfera. 



Lingula squamiformis. 



Spirifera trigonalis. Cephalopoda. 



Camarophona isorhgncha? Orthoceras Koninckianum Pd'Orb. 



Chonetes sp. 

 Pelecypoda. Vermes. 



Sangiiinolites plkatus, Portlock. Serptilites mcmhranaceus. 



Nticula gibbosa. 



Nuculana aitenuata. Fishes. 



Frotoschizodus axiniformis. Palseoniscid scale and tooth. 



FaraUelodon of. VerneuilUanus, 

 de Kon. 



1 Abstract of paper read before British Association in Section C (Geology) 

 Dublin, September, 1908. 



