isus-isiu.; 2 7 7 



inches by 18, and others forming a vertical series in the chalk cliff 

 appeared to be quite as large, but were inaccessible. Two lying 

 on the ground measured respectively 27 inches by 16, and 35 

 inches by 16. A specimen of Belemnitella mucronata, the most 

 characteristic fossil of the zone, was found, and also a fragment of 

 Inoceramus. Erratics of granite, gabbro, quartzite, mica-schist, 

 and Ailsa Craig riebeckite-eurite were noted. 



In the last quarry visited chalk to a depth of at least 50 feet 

 was visible, surmounted by about 25 feet of rudely-columnar 

 basalt, capped by boulder clay averaging 20 feet in depth. 

 Similar erratics were found, and the great alteration in the chalk 

 close to a basalt dyke was observed with interest. 



SQUIRE S HILL. 



The Geological Section of the Club visited the chalk quarries 

 at Squire's Hill on 6th November. There was a large attendance 

 of members, and after leaving the tramcar at Ballysillan an 

 enjoyable walk brought the party to the Horseshoe, in full view of 

 the quarries. 



The formations represented in the immediate district are, Mr. 

 Tomlinson mentioned, in descending order, the Lower Basalts and 

 Volcanic tufa, the Chalk, the Greensand, the Lower Lias, and 

 the Trias, and, he stated, that in the upper part of Carr's Glen, 

 just below the quarries to be visited, good sections of the Trias, 

 Lias, and Cretaceous rocks occur in regular sequence in a deep 

 valley of erosion. After the conclusion of the Chairman's remarks 

 the party proceeded to the quarries, where Mr. Robert Bell 

 kindly acted as field conductor. 



The chief features of interest in the first two quarries visited 

 were the fine exposures of hard white chalk, with bands of flint 

 traversed by numerous vertical dykes of basalt, the chalk in the 

 vicinity of these being much altered. In one instance a very 



