Proceedings of the Geologists' Association, Volume 7Geologists' Association, London., 1883 - Geology |
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abundant anticlinal appear Association Atlantic bands basalt beds Cambrian carbonate Carboniferous Chalk cliff Coal coast Colwell Bay conglomerates contain Corals Cretaceous deep-sea deposits depth district east Eocene evidence Excursions fathoms fault fauna feet felspar flint formation forms fossils fragments Gault genera genus Geol Geological Geologists glacial gneiss granite gravel Greensand grey Harrogate Headon Hill interest junction Keswick known lake lavas lime Limestone Lobley London Clay Lower marls mass meeting Members metamorphic miles Millstone Grit mineral mountains Museum neighbourhood occur paper party Permian portion Portland pre-Cambrian present President probably Proc Prof Purbeck quarry quartz Red Sandstone remarkable river rocks sand sandstone schists seen shaft shales side silica Silurian Skiddaw Slates Society species specimens stone strata surface Tertiary thickness tion tunnel Upper Vale of Wardour valley Volcanic Series Weald Wealden whilst
Popular passages
Page 240 - that the foundation of the whole of geological science — that is, the interpretation of the phenomena presented to us in the study of the earth's crust — must be based upon the study of the changes at present going on upon the surface of the earth, including, of course, the depths of the sea...
Page 242 - As the vegetation ceases at a line far above the deepest regions of animal life, of course the zoophagous mollusca are altogether predominant in these parts, while the phytophagous are more peculiar to the upper regions. The observation of Professor E.
Page 279 - Archaean ridge of crystalline rocks which ranged probably from Scandinavia through the central highlands of Scotland, and included the north and west of Ireland, with the counties of Donegal, Derry, Mayo, Sligo, and Galway — in all of which the Cambrian beds were absent, so that the Lower Silurians repose directly and unconformably on the crystalline rocks of Laurentian age.
Page 280 - Bêche was unable in that neighbourhood to detect any base for the Silurian strata. In the same year at St. David's I traced a provisional line between the black and the purple slates, and this was afterwards adopted as the line between the Silurian and Cambrian strata.
Page 300 - We have recently extinct craters ; we have hot springs and lava flows. 5. There is a decided parallelism between the lakes and the strike of the mountains, and they occupy vast valleys surrounded by high ground or table-land. 6. The mountains consist chiefly of crystalline and schistose rocks and gneiss. 7. The number of the lakes in the centre of the continent is great ; and some are salt, some brackish with sodium and magnesium salts, and some are fresh.
Page 263 - Sigsbee net, the most improved appliance thus far invented for the purposes of deep-sea exploration, that "the surface-fauna of the sea is really limited to a comparatively narrow belt in depth [about fifty fathoms], and that there is no intermediate belt, so to speak, of animal life between those animals living on the bottom or close to it, and the surface pelagic fauna.
Page 415 - liege men of the forest and demesne of Knaresbnrgh " to join the Lancastrian army. This was a few days before that fatal Palm Sunday which witnessed the complete triumph of the Yorkists at Towton on the banks of the Cock, When the rivers ran all gory, And in hillocks lay the dead ; And seven and thirty thousand Fell from the white and rod.
Page 14 - Wakefield as honorary secretary, and with 164 members in the first year, most successfully carried on the young society with the aims of its founders. The object in view was to facilitate the study of geology and its allied sciences among associated amateurs, by the reading of papers, the delivery of lectures, the formation of a library and a cabinet of typical fossils, the practice of field-lectures or excursions, and the publishing of proceedings.
Page 132 - ... and at greater elevations expanding over the higher parts of the plateau and mountains. At Mount It-ga-chuz they are 5270 feet above the sea. The author considers that the higher terraces can only be explained by a general flooding of the district. Some of the wide trough-like valleys of the plateau contain a silty material which the author regards as a glacial mud. North of the 54th parallel and west of the Rocky Mountains similar evidence of glaciation is obtained ; erratics are found in the...
Page 302 - LAKE SUPERIOR is to be figured to the mind as a vast basin with a high rocky rim, scooped out of the plateau extending from the Alleghanies to the Mississippi valley, a little to the south of the height of land. Its dimensions, according to Capt. Bayfield, are three hundred and sixty miles in length, one hundred and forty in breadth, and fifteen hundred in circumference. The mountainous rim is almost unbroken; its height varies from the average of about...