COUNTY OF LONDONDERRY. | |||
feet. | |||
1 | Moneymore | 183 | |
2 | Mayola R. bridge; nearly half way between Cookstown and Dungiven | 414 | |
3 | Highest part of the road from the bridge on the Mayola R. to Dungnven | 1177 | |
4 | Cragnashoack-hill (the Hawk's-hill); the upper line of the sandstone | 1589 | |
5 | Cragnashoack mountain: top | 1864 | |
6 | Dungiven | 447 | |
The three following heights were directly referred to Dungiven, and thence calculated above the level of the sea. | |||
7 | Benbradagh-hill; upper line of the sandstone | 903 | |
8 | Benbradagh-hill; upper line of the white limestone | 1266 | |
9 | Benbmdagh top | 1569 | |
10 | The Glebe-house of Garvagh | 440 | |
The eight following heights have been referred directly to this spot, and thence calculated above the sea. | |||
11 | Broka-bhoy: a swell of gravel-rag on the slope of Coolcuscrehan mountain | 710 | |
12 | Coolcoscrehan mountain top | 1292 | |
13 | Dunavenny brook; a feeder of Allen water, being the first appearance of the primitive formation on the slope of Cairntogher | 718 | |
14 | Cairntogher mountain top | 1600 | |
15 | A swampy ground on the south side of Cairntogher; the head of several rivers | 1090 | |
16 | Donald hill: upper line of the sandstone | 900 | |
17 | Donald hill top | 1399 | |
18 | Ballyness limestone quarry: upper line of the limestone 717 | ||
19 | Down-hill: mausolæum of the late Lord Bristol | 255 | |
20 | Benyavenagh mountain towards Magilligan point., a complete mass of stratified trap. (rating the limestone at 80 feet.) | 1145 | |
21 | Cady-hill; upper line of the white limestone | 604 | |
22 | Cady-hill top | 1030 | |
24 | Watershead of the road between Coleraine and Newtown-Limavadd | 885 |
Page:Transactions of the Geological Society, 1st series, vol. 3.djvu/229
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