1909-1910.] 



241 



On the first Excursion, Mr. Strachan conducted the party to 

 Lyle Hill, and drew attention to its characteristic form, due to the 

 weathering of the Upper Basalt. At the New Mine on the N.W. 

 side of the hill, he pointed out an exposure of inter-basaltic beds, 

 where the succession below the Upper Basalt was — Pisolitic iron 

 ore 12 to 15 inches, aluminous iron ore 3 to 4 feet, lithomarge 40 

 to 50 feet, passing into Lower Basalt. The quarry near the 

 Railway Station at Templepatrick was visited, where Mr. M'Henry 

 obtained evidence as to the mid-basaltic age of the Co. Antrim 

 rhyolites, but unfortunately much of the fine section of chalk, 

 rhyolite, and Lower Basalt, formerly exposed, is now under water. 



Upon the second Excursion, Scawt Hill, an old volcanic 

 neck, six miles north of Larne, was examined and photographed. 

 The metamorphism of the chalk* exposed in the face of the hill 

 is very striking ; in some instances it is converted into a typical 

 crystalline limestone, but .where it adjoins an interesting basic 

 dyke, traversing the " Neck," microscopic examination has shown 

 it to be completely altered into a calc-silicate hornstone.f 



During the Excursion to the Ballymena District, the 

 eskers at Drumfane and Broughshane were carefully investigated. 

 Determinations of the boulders at both places showed that they 

 were chiefly of local origin. Out of 100 boulders, selected at 

 random at Drumfane, it was found that 70 were basalt, 2 1 rhyolite, 

 4 chalk, 2 flint, 2 dolerite, and 1 Cushendall porphyry ; and out 

 of 100 examined at Broughshane, 76 were basalt, 4 flint, and 

 20 chalk. Stratification and current-bedding were very clearly 

 defined, and a striking photograph of one of the sections at 

 Drumfane, taken on this occasion by Mr. J. L. S. Jackson, is 



* In the Survey Memoir to Sheet 20, p. 9, it is stated that "at Slieve 

 Scawt the chalk has been carried up with the basaltic mass forming the 

 volcanic neck."' 



t See Paper on " A Case of Metamorphism of Chalk," by Geo. C. Gough. 

 A.R.C.S., B.Sc, F.G.S., Geological Magazine, April, 1907. The "Case" 

 described is this occurrence at Scawt Hill, which appears to be the first 

 recorded instance of such an alteration in ordinary white chalk. 



