288 PKOCEEDINGS OF SOCIETIES. 



PLATE VI. 



ILLUSTRATIVE OF A PAPER, BY JOHN KELLY, ON THE SUBDIVISIONS 



OF THE CARBONIFEROUS FORMATION IN IRELAND. 

 Fig. 



1 . Sketch on the shore at Bundoran, at low water : b, c, d, a ravine ; 



c, e, a vertical fault, having the dotted part d, Old Bed Sand- 

 stone, on one side of it ; the shaded part b, Carboniferous slate, 

 with fossils, on the other. 



2. Sketch of section at Kildoney, near Bally shannon : the dotted part 



Old Bed Sandstone, the other part limestone ; b, d, a vertical fault 

 between them, which brings the two rocks into juxtaposition 

 at the surface. 



3. Sketch of section on the shore at Cultra, four miles K, E. of Bel- 



fast : from a to b red sandstone ; from b to c gray and black shale, 

 containing scales of Holoptychius and Paloeniscus, with Modiola, 

 and others ; c, d, red sandstone ; d, e, yellow magnesian lime- 

 stone ; e, /, red sandstone ; /, g, thin beds of bluish-gray lime- 

 stone and red sandstone alternating ; g, h, red sandstone. At e f 

 d> e > f> 9> whin dykes, generally vertical. 



4. Sketch section from Shean Hill, on the south, across a part of Lough 



Erne to Portinode, on the north : A, «, bands of millstone grit on 

 the different sides of the fault e, f, and geological equivalents ; 

 B, b, limestone groups, and equivalents also; C, e, Carboniferous 

 slate, same ; D, d, Old Bed Sandstone, same ; g, a talus of debris 

 at base of cliff adjoining the fault ; h, a part of Lough Erne. 



5. Sketch section near Bundoran, looking IS". W. : a, a band of millstone 



grit ; b, limestone in Dartry mountain ; c, Carboniferous slate, 

 which lies in conformable succession on d, the upper part of the 

 Old Bed Sandstone, which here, as in most other places, is yel- 

 lowish ; e, Carboniferous Slate, separated from d by a fault ; /, 

 limestone at Einner Point, the junction with e, not clear, being 

 covered with sand. 



6. Sketch section through the Slievebeagh mountains, from Monagh 



to near Clogher, looking westward : o, b, sandstones and shales 

 of the Coal series alternating ; c, Carboniferous Limestone ; d, 

 Carboniferous Slate ; e, Old Bed Sandstone ; /, Graywacke, or 

 gray clay-slate and grit alternating ; g, brown grit, with red and 

 purple shales alternating, the grits resembling those near Ferri- 

 ter's Cove, Dingle. 



Vide page 100. 



