Explanation to Accompany Sheets 1- Volume 41-50; V. 53-61; V. 64; V. 72 - Ireland Geological Survey

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1879 Excerpt: ...the northern side a very considerable accumulation of Drift, formed into smooth rounded hills or "drumlins," with their longer An ancient place of note connected with the life of St. Patrick, and containing some antiquarian remains. t Or "Mountain of the Griddle," from the large flat Cromlech stone on top, lately dismantled. axes having a general N.N.W. bearing; many of these occur as islands along the southern margin of Strangford Lough. The country south of this rocky tract is, for the most part, Drift-covered, in swelling undulations, attaining no great elevation, the highest being Corbally Hill, 213 feet, Ballymenagh Hill, 204 feet, and Centre Hill, 193 feet. From Dunsford, southward, the country is rather level, or in gentle slopes to the northern shore of Dundrum Bay, which is bounded on the east by the promontory of St. John's Point In the Portaferry district of the Ards, the highest elevation attained is at Ballywhite Hill, 339 feet, and Ballyherly Hill, 262 feet, about half a mile apart; these constitute a rocky ridge, with a rather steep but smooth descent to the N.W., which side, together with the summit, is greatly ice-planed, and devoid of Drift. To the north of this, along the Ardquin shore of Lough Strangford, is a remarkable series of rounded Drift hills. The other elevations in this district are inconsiderable, and are mostly formed of Drift, which very abundantly overlies this southern end of the Ards promontory. Exposures of rock chiefly occur around its shores, and in parts inland, and almost wherever such exist, traces of ice-action are to be seen. The two islands of the "North and South Rocks" lie off the eastern shore (in sheet 50), at a distance of about two miles, and are about the same distance apart. ...