Page:Transactions of the Geological Society, 1st series, vol. 3.djvu/206

 in surveying, to construct such projections as have been described from their detached sketches; and to such objections it is felt that the present example lies particularly open: it is indeed offered merely as an approximation to a correct representation. Such as it is, however, it is presented to the Society, in the belief that the errors are not of a nature to interfere with fidelity in laying down the great geological features which distinguish this interesting coast, and that these features are in themselves so important as to render any delineation which might in this respect (however imperfect in others) pretend to some degree of accuracy, desirable.

In describing these sections the very ample information collected by Dr. Berger concerning this district, will render it unnecessary to exceed the limits of a rapid survey; this I shall commence at the south-east extremity of the line represented, proceeding towards the north-west.

In this direction the lias formation is seen at the extremity of the section occupying the lower regions of the promontory over which the Deer park of Glenarm extends, near its southern point; the ground here ascends with a rapid slope, above which cliffs of chalk covered by basalt rise to a considerable height: advancing towards the north the lias dips beneath the level of the sea, and the beach is skirted by a chalk cliff.

On doubling the promontory, Glenarm presents itself situated in a narrow valley bounded on the east by the Deer park hill, and on the west by Bellaire hill, both of which in their sections towards the sea exhibit cliffs of chalk covered by basaltic platforms. The distant hill seen rising above the opening of this valley, is Slieve Mish, it consists entirely of greenstone. Near Glenarm is the remarkable compound dyke mentioned in page 172.