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trap in Island Magee, as it is for the most part in the rest of An- 

 trim. Between the second and third lies Larne Lough. What the 

 rock may be under the bottom of this lough there is no means of 

 knowing ; the lias appears on both sides along the shore, with the chalk 

 over it. Between the third and fourth lines trap appears, as in all the 

 rest of the country. 



In the vicinity of Larne the whole of the chalk band declines north- 

 ward, from 480 feet at Bellahill to the shores of the lough. About the 

 town they seem to join ; and half a mile farther north, the band dips 

 into the sea, under the Blackcave tunnel, at an angle of about 20°. It 

 soon rises up again, in the townlands of Drains and Droagh, and occu- 

 pies the flat country towards Ballygalley Head, where a protrusion of 

 columnar trap throws up the beds on their edges. It soon again, how- 

 ever, resumes its level position, and spreads over the country inland to 

 Eory's Glen, Sallagh Braes, and Ballygilbert. 



10. Eory's Glen is seven miles north-west from station No. 9. This lo- 

 cality is like Bedbrow in some respects. The limestone here dips west 

 20° south, at an angle of 5°. Kilwalter demesne is nearly all on lime- 

 stone ; and it abounds so in this part of the country, that a man might 

 walk the whole way from this to the sea, near Ballygalley Head, on this 

 rock. It stands here at 680 feet above sea, and declines gradually in 

 four miles to the shore. There is no sign that this field of limestone 

 was ever wholly covered with trap, like the country west of this sta- 

 tion ; yet there are some trap dykes, and some large protrusions inter- 

 spersed through the low lands. 



The thickness of the limestone at Eory's Glen cannot be ascertained, 

 as the bottom has not been reached. "Waterloo House, four miles off, 

 and a mile north of Larne, on the shore, is the nearest place where it 

 could be measured, and there it turned out to be 101 feet ; but this is not 

 quite certain, as the bottom of it, joining the greensand, was concealed,- 

 and only guessed at. At the Ballylig quarry, on the west edge of 

 Larne Lough, it measures 105 feet. 



In speaking of the limestone near Belfast, reference was constantly 

 made to its outcrop, but here it has no outcrop. It dips westward under 

 the basaltic mountain called Agnew's Hill; and from this place, as al- 

 ready stated, it slopes or dips gradually to the sea shore, showing an 

 anticlinal line along the base of the mountains. 



11. Sallagh is three miles north of Eory's Glen. The townland con- 

 tains 723 acres, and has an extraordinary appearance, inasmuch as it is 

 bounded on the south and west by a semicircular range of basaltic pre- 

 cipices, 600 feet high above the low and flattish part of the land at its 

 base, the whole forming one of the finest amphitheatres of natural land- 

 scape. The diameter of the semicircle is about a mile and a half, from 

 Ballytober to Knockdhu. This range of precipices is called Sallagh 

 Braes. The limestone is not quarried here to any extent, but is known 

 in the land. It stands between 500 and 600 feet high above the sea, 

 and from this place occupies the country continuously to the shore, both 

 north and south of Ballygalley Head — a distance of two miles — declin- 



