380 MAJOR A. R. DWERRYHOTTSE OX THE [vol. lxxix, 



north and south, and a careful study of them has led me to the 

 conclusion (in which Mr. W. B. Wright, who visited a portion of 

 this country in my company, concurs) that they represent frontal 

 moraines similar to, though of less magnitude than, those of the 

 Dungannon-Castlecaulfield area. 



The gravels contain purple porphyrites, diorites, red granite and 

 quartz-porphyry, schist and gneiss, all from the Tyrone Axis ; 

 limestone yielding LitJiostrotion, red limestone, red sandstone, 

 flint, burnt flint, chalk, ironstone-nodules from the Lough-Neagh 

 Clay (local)'; and Ailsa Craig eurite. Here again is evidence of 

 the earlier glaciation from the north-east, followed by that from 

 the west. 



Still farther south, on the rising ground near the city of Armagh 

 and the village of Rich Hill, these morainic accunrulations are 

 still more conspicuous, and the country from Markethill to Tan- 

 deraaree is of similar character. 



The Area east of Lough Neagh. 



It has already been mentioned (p. 375) that in the neighbour- 

 hood of Moira and Soldierstown are to be found boulders of rocks 

 from the Tyrone Axis, and these can be traced for some distance 

 north-eastwards ; but the}'' appear to be absent bej^ond a line drawn 

 from the mouth of the Crumlin River through Glenavy to Lisburn. 



The shores of Lough Neagh are in many places covered with 

 shingle, the pebbles of which have been derived from the local 

 drifts, which sometimes form low cliffs bordering the beach. These 

 beaches make excellent collecting-grounds for the study of the con- 

 tents of the drift-deposits, and careful examination has failed to 

 reveal a single pebble of the Tyrone rocks, so common farther 

 south, on the lough side from Moore's Quay northwards by Ardmore 

 Point, Dunore Point, and Antrim Bay ; indeed, it is not until the 

 neighbourhood of Randalstown is reached that they again appear. 



At Dunore Point the shingle consists almost entirely of basalt ; 

 but there are a few small pebbles of chalk, flint, rhyolite, quartzite, 

 and vein-quartz, also Ailsa Craig eurite. Tyrone rocks are absent. 



The Scottish ice has already (p. 374) been traced inland from 

 the neighbourhood of Larne by Ballynure and Ballyclare, and this 

 glacier moving in a south-wester^ direction extended to the 

 Belfast Hills. 



Striations on basalt about 2 miles south of Templepatrick run 

 south 25° west, and another set on Armstrong's Hill, a spur of 

 Divis, from east to west. 



On the summit of Divis (1567 feet O.D.) there is little or no 

 drift, but small angular flints are to be found right up to the 

 cairn. These flints can only have been derived from the Chalk 

 outcrops near the foot of the eastern basalt-escarpment, some 

 700 feet lower, and about a mile away to the north-east ; they 

 indicate that the summit was overridden at the period of maximum 

 extension of the Firth-of- Clyde glacier. Flint-pebbles are also 



