Journal of the Royal Geological Society of Ireland, Band 1 |
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Häufige Begriffe und Wortgruppen
abundant acid angle appear basalt beds Bonmahon boulders breccia calcareous carbonate of lime cave chalk character chlorite clay cliffs coast colour columnar compact composed conglomerate considerable containing county of Antrim crystalline crystals deposits described detritus diluvial Dinas Dinlle direction distance district dolomite Dublin dykes earth east elevation eurite evidence examination exhibited extends feet felspar formation fossil fragments Geological Society geologists glacier granite gravel greenstone greywacke hills hornblende igneous imbedded Ireland lake Limerick limestone loam Lough Neagh magnesia marl masses mica slate miles mineral mountain nearly northern drift observed occur old red sandstone organic remains Pallas Green pebbles phenomena porphyry portion present quarry quartz red sandstone remarkable river sand schist shells shore side similar spar species specimens spilites stone strata stratification structure substance summit surface tain thickness tion traced trap rocks trapp valley variety veins
Beliebte Passagen
Seite 302 - Ye ice-falls! ye that from the mountain's brow Adown enormous ravines slope amain—- Torrents, methinks, that heard a mighty voice, And stopped at once amid their maddest plunge! Motionless torrents! silent cataracts! Who made you glorious as the gates of Heaven Beneath the keen full moon? Who bade the sun Clothe you with rainbows ? Who with living flowers Of loveliest blue, spread garlands at your feet?— God!
Seite 361 - London, whose name is so well known and deservedly identified with the mining interests of England. "The ancient workings were now completely cleared, and some rude tools discovered, such as oaken shovels and iron picks, the latter of an extraordinary size and weight; also the remains of fires, which had been evidently made use of to crack and loosen the masses of calcareous spar and carbonate of lime, in which the ore of this mine is chiefly imbedded.
Seite 86 - The grand Kingston gallery is the most remarkable compartment of the entire excavation. It is a perfectly straight hall, 175 feet in length and 7 in breadth, with a direction about one point to the west of north. The arching of this gallery is in the Gothic style, and its walls are everywhere glazed with spar, in some places red, in others mottled, but nowhere of a perfectly white colour.
Seite 203 - In Ireland the hunting of the wolf was carried on for many years, and in the " Irish Commons' Journals" for 1662, it will be seen that Sir John Ponsonby, reported from the Committee of Grievances, that a bill should be brought in to encourage the killing of wolves and foxes. It is by this easy to conceive the unimproved state of Ireland at that time. The covers for these were bogs and mountains ; on the latter there were not many forests, but there was abundance of underwood, then called shrubs ;...
Seite 203 - They (the Irish) are not,' he says, ' without wolves, or greyhounds to hunt them, bigger of bone and limme than a colt.
Seite 209 - The upper stratum was a bed of red clay, 3 feet deep : the second blue clay, 4 feet ; the third black wood. 4 feet, reposing on another stratum of clay. This stratum of wood is of one uniform mass, and is capable of being cut with a spade. Sometimes the wood will not easily break ; in that case it requires the aid of some other tool to separate it from the mass ; and may, if properly done, afford a block of 200, 300, or 400 Ibs., which, being carefully examined, is found to consist more or less of...
Seite 81 - Galtee and Knockmildown chains of mountains, the former constituting its northern, the latter its southern boundary. The prevailing rock at this extremity of the Galtees is conglomerate, which occasionally passes into sandstone ; while that which composes the opposite chain of hills possesses a structure intermediate between that of sandstone and schist, and includes few if any rounded or water-worn pebbles. The material of the interposed valley is compact grey limestone, and this rock forms two...
Seite 88 - ... to create an irrespirable atmosphere ? These are interesting but difficult questions, and the following is put forward only as a conjectural solution of the difficulty. These caves are usually traversed by running water, and as this, at common temperatures, combines with one volume of carbonic acid, the gas may be considered as in a continual process of absorption and removal. It is a peculiarity, also, of aeriform fluids, as Dalton has shown, that however different in density, they will, when...