Abstract of the Proceedings of the Liverpool Geological Society, 3권 |
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appears Arctic bed of shale Boulder-clay Carboniferous Limestone Cefn-y-Fedw Sandstone Cheshire Chrysocolla clay Coal colour containing Copper crystals débris denudation deposits depth district Drift earth east Eglwyseg Eglwyseg ridge evidence exposed fault feet felspar flint formation fossils Geol Geological Society Geological Survey Glacial Period Glaciers gravel inches Journ Lancashire land Liverpool Liverpool Geological Llangollen Llanymynech Llawnt lodes lower beds Lower Brown Limestone Lower White Limestone Mersey miles Millstone Grit mineral MORTON mountains North Wales occur Old Red Sandstone Oswestry pebbles Phil present probably Proc Productus quarry quartz Red Sandstone remarkable river Road rocks sand Sandy Limestone Shale shells Silurian solids in solution species square mile stone strata Street striæ striated subdivision sulphate surface Survey Map Sweeney Mountain temperature thickness Treflach Trevor Triassic Ty-nant Ty-nant ravine upper beds Upper Grey Limestone Upper White Limestone valley volcanic Wenlock
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255 페이지 - ... in Greenland, in the form of snow and rain, at 12 inches, and that of the outpour of ice by its glaciers at 2 inches. He considers that only a part of the remaining 10 inches is disposed of by evaporation, and that the remainder must be carried to the sea in a form of sub-glacial rivers. These sub-glacial rivers are familiar in all Alpine countries, and in Greenland pour out from beneath the glacier, whether it lies at the sea or in a valley, and in summer and winter.
390 페이지 - ... Llangollen. This lower subdivision rises into three conspicuous hills, is extensively quarried in many places, and is the most important economically considered. There are several large quarries about Treflach Wood, which is about a mile to the south of Trefonen, where the Upper Grey Limestone again occurs, cropping out from under the soft red beds of the Lower Cefn-y-Fedw Sandstone, the Sandy Limestone not being exposed. The following is a section of the strata forming the subdivision as exposed...
367 페이지 - Thus, in Mar forest, in Aberdeenshire, large trunks of Scotch fir, which had fallen from age and decay, were soon immured in peat formed partly out of their perishing leaves and branches, and in part from the growth of other plants.
367 페이지 - In the time of the Romans the Danish Isles were covered, as now, with magnificent beech forests. Nowhere in the world does this tree flourish more luxuriantly than in Denmark, and eighteen centuries seem to have done little. or nothing towards modifying the character of the forest vegetation. Yet in the antecedent bronze period there were no beech trees, or at most but a few stragglers, the country being then covered with oak.
336 페이지 - When there has been no reason to suppose that the trawl has sunk more than one or two inches in the clay, we have had in the bag over a hundred sharks' teeth, and between thirty and forty ear-bones of whales.
6 페이지 - Stones and boulders alike are scattered higgledy-piggledy, pell-mell, through the clay, so as to give to the whole deposit a highly confused and tumultuous appearance. There is something very peculiar about the shape of the stones. They are neither round and oval, like the pebbles in river gravel, or the shingle of the sea shore, nor are they sharply angular, like newly-fallen debris at the base of a cliff, although they more closely resemble the latter than the former. They are, indeed, angular...
136 페이지 - HAWORTH (AH). 1. Review of the Rise and Progress of the Science of Entomology in Great Britain, chronologically digested. — Tr. Ent. Soc. Lond. 1812, p. 1.— Bibl. Ent. I. p. 166. 2. Prodromus Lepidopterorum Britannicorum, a concise Catalogue of British Insects.
228 페이지 - If we allot 50 tons to carbonate of lime, 20 tons to sulphate of lime, 7 to silica, 4 to carbonate of magnesia, 4 to sulphate of magnesia...
339 페이지 - ... to 12° S., along the shores of the Pacific. This is a distance, in a north and south line, of 2,075 geographical miles. From Byron's observations, the elevation has no doubt extended sixty miles...
252 페이지 - ... of these pebbles both in moraines and also in the Boulder-clay illustrates what had been deduced from previous investigations in the Valley of the Mersey — that in Britain, during what is called the Glacial Period, ' the glaciers did not progress from an immense accumulation in the north, but were formed by the snow-fall in the respective valleys ; being of such an extent only as might reasonably be considered due to the amount of deposition on their water-slopes.