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ends near the cross-road of Knockans south, at the lime kilns. The 

 southern boundary passes a few yards south of the village of Knockans, 

 a little to the south of Mount Edwards House, and so on to the Coast 

 Guard station at Bellisk. It joins the Devonian brownstone at the 

 mouth of the river, and occupies the coast for half a mile southward, to 

 a little boat harbour, without rocks, a few yards wide, and 150 yards 

 north of the Coast Guard station at Bellisk, to which I have just 

 alluded. 



The whole area is nearly in the shape of a triangle. It occupies 

 about three quarters of a square mile, and forms one continuous mass. 

 Geologically it is bounded by the brown Silurian grit on the north and 

 west sides, and on the south by new red sandstone. It appears to 

 have been protruded between those two rocks. It has many changes in 

 its appearance. In colour it is composed of red, brown, and grey, 

 passing into one another. On the shore it contains pebbles, and puts 

 on the appearance of a coarse conglomerate — both pebbles and matrix 

 being, however, crystalline. In a quarry immediately south of the 

 town it assumes a dark bluish colour, and is crystalline : sometimes it 

 resembles greenstone. Pieces of jasper have been got in it near the 

 shore. 



The conglomeritic appearance of the porphyry, with its pebbles of 

 brown quartz, and the conglomerate of the new red sandstone, near 

 the Coast Guard station, have a striking resemblance to each other at 

 the first glance, but there is no passage from one into the other. The 

 very lowest beds of the new red sandstone, though full of large frag- 

 ments of the porphyry, have fine red sandy layers between them. The 

 porphyry has no fine sand, nor any such layers. The new red sand- 

 stone contains rounded pieces of mica slate, up to six or nine inches in 

 diameter. The porphyry has none of this rock. 



The porphyry, which disappears on the shore at Bellisk, rises gra- 

 dually, but with rather a hummocky surface, to about 400 feet above 

 the sea at Knoekan's fort, near the south-west angle, where it is quar 

 ried for the roads. 



Half a mile north-west of Cushendall is Tiveara, a small hill, but 

 steep and high for its breadth of base. It is a protrusion of crystalline 

 greenstone. It is detached from the porphyry district of Cushendall. 



Sandy Brae Porphyry. — About five miles north-east of the town of 

 Antrim this porphyry occurs : it forms a roundish district, of about 

 three miles from north to south, and four miles from east to west, or 

 about ten square miles. It is composed of six moderately- sized hills, 

 with smaller ones between them. The heights of those hills on the 

 Ordnance Maps are — 



Feet. 



1. Tardree, three miles south-east of Kells village, . . 798 



2. Barnish, or Sandy Brae, four miles east of Kells, . 786 



3. Bally go wan, four miles eastward from Kells, . . 633 



4. Brown Dod, four miles south-east of Kells, . . 860 



5. Carnearny, the highest, three miles south-east of Kells, 1043 

 Corby Knowe, two miles south-east of Kells, . . 598 



