210 Scientific Proceedings, 'Royal Dublin Society. 



MUNSTER, or SOUTH-WEST IKELAND. 



[Clare, Tipperary, Limerick, Kerry, and Cork. Although Waterford is also in 

 Munster, as its rocks are so intimately connected with those of Wexford and Wicklow, 

 it has heen described with the S.E. district.] 



Chronological Account. 



The groups in this area are Ordovicians, Llandovery or May 

 Hill Sandstone, Silurian, Devonian or Lower Old Red Sandstone, 

 and Carboniferous. 



[In Cork and Kerry, as already explained, there are types of strata not found 

 elsewhere. The Glengariff Grits and Dingle Beds are a peculiar type of the 

 Silurian, although somewhat similar rocks (Mweelrea Beds) occur in Cos. Mayo and 

 Galway, and others in Fermanagh and Tyrone (Fintona Beds) ; while the Yellow 

 Sandstone and Carboniferous Slate are different from any Carboniferous rocks elsewhere 

 in Ireland.] 



In the Anascaul beds (Ordovicians) there are to the north, 

 and also some distance south of Anascaul, felspathic tuffs. 



In the Ferriter's Cove series (Silurians) Dingle promontory, 

 at Swerwick Harbour, Ferriter's Cove, north and south of Clogher 

 Head, and in Inisvickillaun, there are wkinstones, felstones, and 

 numerous beds of tuff ; in Beginish and Young's Island, also, there 

 are tuffs. 



In the Glengariff Grits (Silurians) there are intrudes and 

 apparently interstratified sheets of euryte and whinstone with, in 

 places, their associated agglomerates and other tuffs. 



[The Glengariff grit eurytes are geologically both interesting and important, as they 

 are characteristic of these Silurians. They occur not only here but in the Silurians of 

 North Galway and South Mayo, in those of Fermanagh and Tyrone, and in the Silu- 

 rian conglomerate at Cushendun, Co. Antrim.] 



The " Lower Old Bed Sandstone " of the Geological Survey 

 maps (under Jukes) of Kerry and Cork is the representative of the 

 Devonian, or the passage-beds between the Silurian and the Carboni- 

 ferous. As their upper limits are not exactly defined, it is possible 

 that some of the exotic rocks supposed to be in the Silurian may 

 possibly be more properly in them. Elsewhere there are intrudes 

 and apparently interbedded sheets of whinstone. In places at the 

 base of the Lower Carboniferous Sandstone there is a peculiar 



