A guide to Belfast and the counties of Down & Antrim . periods of quiet, between the successive out-flows of igneous material, the surface of the lava flow wassubjected to denudation, a scanty soil was formed, vegeta-tion got* a footing, only to be submerged in the next of such vegetation are to be found in a well-defined band forming the division between the lower andthe upper basalts. The band consists of volcanic tuffs,clays, conglomerates, thin lignites, and pisolitic iron Ballypallidy this seam has yielded abundant remains ofplants—Finns, Sa/ix, Populus, Acer, Quercus,
A guide to Belfast and the counties of Down & Antrim . periods of quiet, between the successive out-flows of igneous material, the surface of the lava flow wassubjected to denudation, a scanty soil was formed, vegeta-tion got* a footing, only to be submerged in the next of such vegetation are to be found in a well-defined band forming the division between the lower andthe upper basalts. The band consists of volcanic tuffs,clays, conglomerates, thin lignites, and pisolitic iron Ballypallidy this seam has yielded abundant remains ofplants—Finns, Sa/ix, Populus, Acer, Quercus, etc. At Ballin-toy lignites are found. Mr. Starkie Cardner considers these remains indicate thesame horizon as the Bournemouth beds; that is, they belongto the middle Eocene period. 88 Guide to Belfast. The Pleistocene Deposits.—Our district presents many prob-lems for the glacial geologist. Boulder clay is widelydistributed over the surface of the country. Fine sections ofthese clays are exposed in the numerous brickfields around. y. St. 7. CONEY ISLAND. Sections of Boulaer Clay overlain liy Consolidated Sands and Gravels(dacial Stri?e on Rocks in furejjroiinc!. Stratigraphical Gcoloi^v. 89 Belfast. The clay rests upon intensely glaciated rocks; theCretaceous rocks of Antrim and the Ordovician shales ofCounty Down retain the polishing and scoring in greatperfection. The division into upper and lower boulder clay,with the intermediate sands and gravels, is not alwaysapparent; often only one division being visible. The clayis typically red, tough, unstratified, and laden with erraticswell rounded and scored, of all dimensions, from greatblocks of chalk and basalt down to tiny pebbks, whichhave often travelled long distances from their parentlocality. In different districts the texture varies consideral:)ly, someclays containing a good deal of sand, probably derived fromthe Trias. Interesting deposits of stratified sands and gravelsare numerous in th
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