Page:Transactions of the Natural History Society of Northumberland, Durham, and Newcastle-upon-Tyne (1867).djvu/97

Rh generally measured from these as a basis by the Aneroid barometer. )

This is a long narrow tract extending 30 miles along the coast, from the Tweed nearly to the Aln, through which flow several small streams from west to east. From the plain of the Till on the west, it is separated by the range of sandstone and basaltic moor, which has been mentioned already. Ross Castle, the highest point of the range (see above), is at the point where districts one, two, and three meet. For some distance northward the ridge is often 3 or 4 miles broad, with a decided slope on both sides, and is but little planted or cultivated. For 8 miles it maintains this character of heathery moor, the most interesting plants being ,  and , all of which occur in considerable plenty. Black Heddon, north of Belford, is a conspicuous heathery ridge, between 600 and 700 feet in altitude, with a base of arenaceous crag. On the north-east, parallel with Black Heddon, but extending beyond it in a northern direction, are Kyloe Crags, the finest range of basaltic cliffs in the northern part of the county. This ridge is a mile in length and slopes towards the sea, which is not more than 2 miles distant. The direction is from north-west to south-east, and the highest point a little under 600 feet. The seaward slope is gradual and grassy, but the opposite face is precipitous, the actual cliff being not more than 20 feet or 30 feet in depth; but the bank beneath it, about 50 feet in all, is steep and thickly covered with basaltic debris. A list of the plants of this crag