F. R. Cotvper Reed — Pre- Glacial Marine Terrace, Wexford. 507 



(1) Granite, intrusive in the gneisses and schists. 



(2) Schistose gneisses, with an interstratified calcium- silicate- 



hornfels rock. 



(3) Mica-schists, with highly crystalline limestones and clay 



slates interbedded. 



(4) Amphiholites, with graphite-quartzite-schists and mica-schists. 



(5) Chloritic and sericitie schists. 



He also says that varieties of granite frequently penetrate one into 

 the other. 



Mr. A. W, Rogers,' Director of the Geological Survey of Cape 

 Colony, has described the masses of granite and gneiss of Griqualand 

 West and of the Cape Colony, by far the greater proportion of which 

 occurs in the north-west of the Colony, but so far he had found no 

 evidence of a difference in age between the granite and gneiss. As 

 already stated, he is, however, inclined to admit a difference in age 

 between the granulites of the Prieska district and the normal granite 

 and schists ; this will be referred to again later. 



He mentions the occurrence in the south-western districts of rocks 

 of more basic composition than granite as being intrusive in both the 

 granite and Malmesburg Beds. Here the granite is intrusive in the 

 Malmcsbury Series and the Namaqualand Schists, which are both 

 correlated with the Swaziland Series of the Transvaal. 

 [To ie concluded in the December Number.) 



VIII. — Notes on the Phe-Glacial Rock-Platfokm on the Wexfokd 



Coast. 



By F. R. CowPEii Reed, M.A., F.G.S. 



rpHE occurrence of a pre-Glacial marine terrace and raised beach 

 J_ along the coast of the south of Ireland was described by 

 Messrs. Wright & Muff in 1904,^ and its development in the eastern 

 part of CO. Waterford was the subject of two short papers by the 

 author in 1907^ in this Magazine. Messrs. Wright & Muff (op. cit.) 

 observed the same raised beach only in the south-eastern portion of 

 CO. Wexford, so that its recognition this summer by the author further 

 north along the east coast of Ireland deserves recording, for it has 

 been traced for several miles to the north and south of Courtown 

 Harbour, and its height, characters, and relations to the overlying 

 deposits show that it is a continuation of the same feature. The first 

 locality to be mentioned is about 3 miles to the south of the village 

 of Courtown, where relics of it are preserved between Roney Point 

 and Salt Rock ; it is still more distinct as a rock-terrace a little 

 further north at Pollshone Head and Breanoge Head, but in the bays 

 between these points the conditions are not favourable for its exposure, 

 as there are no rocky cliffs, only extensive sand-dunes stretching 



' An Jtitroduction to the Geology of Cape Colony, by A. W. Rogers, 1905 

 (Longmans, Green, & Co., London). 



2 Wright & MufP, Proc. R. Dublin Soc, 1904, vol. x, pt. ii, pp. 250-324. 



3 Reed, Geol. Mag., 1907, Dec. V, Vol. IV, pp. 17, 549. 



