691 



TRANSACTIONS OF SECTION C. 



sea- floor off western Ireland can he deduced from a study of the stents lying on 

 it from point to point. The most interesting recent results are the d'scovery of 

 abundant flints, chalk, gkuconitic chalk, and two specimens of Miliolin-- limestone 

 in dredgings off the coast of Kerry. Mr. Worth's observations in 1908 on similar 

 materials in the English Channel thus receive confirmation from areas much 

 further west, 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. 



4. On a Section of the Lower Coal Measures 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 

 Prumgla's 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. 



Strata 46 



Coal (inferior) 



Strata . . ' 3 



Coal 



1. 



ft. in. 

 2 7 

 1 10 



2 n 



2. 



Strata 6.5 



Coal (in thin pat tings with shale) 2 



Strata 44 



Coal 



Coal 



f Top Coal 

 Brown Shale 

 Coal . 

 Inferior Coal 



I Coal . 



Strata . 

 Coal 



11 

 3 



10 



Down to the level of the 4ih Coal, the strata consisted mainly of red, 

 yellow, and grey sandstones, with grey bind partings. Below tbe 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 gquamiformh. 

 Sjiirijera trigonalis. 

 Camarophoria isorhynoha ? 

 Chonetes, sp. 



Pelecypoda — 



Sangninolitest pUcatus, Portlock. 

 J^'uoula gihhosa. 

 Nvculana attemiaia. 

 ProtoscJdzodvs axiniformis. 

 Paralliiodon, of, Vernnnlliamis, deKon, 



Gasteropoda — 



Pletirotomaria, cf. gemmulifera. 



Cephalopoda — 



Orthoceras Konincldanum 1 d'Orb. 



Vermes— 



Scrpulitcs membranaceous. 



Fishes — 

 Falaeoniscid scale and tooth, 



