Journal of the Geological Society of Dublin, Volume 101864 |
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animals antler appear beds Benbo bones carbonates Carboniferous Cervus megaceros chemical clay colour containing crystalline crystals denudation deposits Devonian direction district Donegal DUB.-VOL Eskers exhibited existence feet feldspar Finland formation fossils galena GEOL Geological Society Geological Survey geologists gneiss granite hills horizontal indentations Ireland island JOURN Journal Jukes Kinahan lake Laurentian lime limestone Lough Gur lower marks marl masses Mayo meeting megaceros metamorphic mica mica slate miles mineral mountain Museum Natural History Society observed occur Old Red Sandstone orthoclase paper peat Plate portion present President Professor Haughton quartz quartz rock Rapakivi Red Deer Reindeer remains remarkable ridges River Royal Dublin Society schist Scott sediments shales Shorapoor side silicates Silurian similar skeleton skull slickensides species specimens Stephen's-green stone strata striated striations surface thickness tibia tion trap Trinity College valley variety veins
Popular passages
Page 71 - President, in the Chair. The Minutes of last Meeting were read and confirmed.
Page 151 - Report of the Proceedings of the Geological and Polytechnic Society of the West Riding of Yorkshire, 1863 — 4.
Page 142 - On the Claims of the Gigantic Irish Deer to be considered as contemporary with Man,'' there is a long discussion on this subject, from which I extract the following statements, which I have not verified personally : — The leg of a Megaceros, with a portion of the tendons, skin, and hair on it, was found in the county of Wexford, on the estate of H. Grogan Morgan, Esq., at Johnstown Castle.
Page 77 - ... primitive rocks.* The question here arises, whether in the absence of organic remains, or of stratigraphical evidence, there exists any means of determining, even approximately, the geological age of a given series of crystalline stratified rocks; in other words, whether the chemical conditions which have presided over the formation of sedimentary rocks have so far varied in the course of ages, as to impress upon these rocks marked chemical and mineralogical differences.
Page 81 - ... baths. From this he was led to suppose that the metamorphism of great regions might have been effected by hot springs, which, rising along certain lines of dislocation, and thence spreading laterally, might produce alteration in strata near to the surface, while those beneath would in some cases escape change. J This ingenious hypothesis may serve in some cases to meet the difficulty pointed out by Naumann ; but while it is un* "Proc. Royal Soc. London," May 7, 1857, and "Philos. Mag.
Page 82 - ... of areas of sedimentary rocks, embracing many hundred thousands of square miles. On the other hand, the study of the origin and distribution of mineral springs shows that alkaline waters (whose action in metamorphism I first pointed out, and whose efficient agency...
Page 127 - The remains were disposed in such a manner as to prevent the possibility of ascertaining the exact component parts of each skeleton; in some places portions were found removed many yards from others, and in no instance were two bones found lying close to each other. Their position also was singular; in one place two heads were found, with the antlers entwined in each other, and immediately under them a large blade-bone; in another, a very large head was discovered, and although a most diligent search...
Page 86 - Chiastolite and staurotide are never met with in the schists of this series, at least in its northern portions, throughout Canada and New England. The anorthosites of the Labrador series are represented by fine-grained diorites, in which the feldspar varies from albite to very basic varieties, which are sometimes associated with an aluminous mineral allied to chlorite in composition.
Page 84 - It has been investigated in Canada along a continuous outcrop from the coast of Labrador to Lake Superior, and also over a considerable area in northern New York. II. Associated with this system is a series of strata characterized by a great development of anorthosites, of which the hypersthenite, or opalescent feldspar rock of Labrador, may be taken as a type.
Page 77 - AT a time not very remote in the history of geology, when all crystalline stratified rocks were included under the common designation of primitive, and were supposed to belong to a period anterior to the fossiliferous formations, the lithologist confined his studies to descriptions of the various species of rocks, without reference to their stratigraphical or geological distribution. But with the progress of geological science a new problem is presented to his investigation. While paleontology has...