The Building of the British Isles: Being a History of the Constitution and Geographical Evolution of the British RegionE. Stanford, 1911 - 470 páginas |
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Otras ediciones - Ver todas
The Building of the British Isles: Being a History of the Construction and ... A. J. Jukes-Browne Sin vista previa disponible - 2018 |
The Building of the British Isles: Being a History of the Construction and ... A. J. Jukes-Browne Sin vista previa disponible - 2016 |
Términos y frases comunes
anticline Archæan Arenig Armorican basaltic basin beneath border breccias British region Brittany Bunter calcareous Cambrian Carboniferous Limestone central Chalk Channel chert Clay Coal-measures coast conglomerate consists Cretaceous deposits detrition Devon Devonian district east eastern eastward England Eocene epoch erosion evidence existence extended facies farther fauna feet thick flexures formation formed fossils Gault Geol Geological gneisses granite grits Hills infer Ireland island Isle Journ Jurassic Keuper lake land lavas Lias Llandeilo Lower marine marls Midland miles Millstone Grit Miocene northern northward occur Old Red Sandstone Oligocene Oolite Ordovician outcrop Palæozoic rocks pass Pebble Beds Pennine period Permian Pliocene probably Purbeck Quart quartzite Radiolaria ridge river sand schists Scotland sea-level sediments Selbornian shales shallow Shropshire Silurian slates southern southward strata submerged subsidence surface syncline thin tract Trias Triassic unconformity uplift Upper valley Vectian volcanic Wales Wealden western westward whole Yorkshire zone
Pasajes populares
Página 470 - CONTRIBUTIONS TO THE PHYSICAL HISTORY OF THE BRITISH ISLES ; with a Dissertation on the Origin of Western Europe and of the Atlantic Ocean. With 27 Coloured Maps. By EDWARD HULL, MA, LL.D., FRS, late Director of the Geological Survey of Ireland.
Página 374 - ... black basalt that .had been poured out as the last of the molten materials from the now extinct volcanoes. There were no visible cones or vents from which these floods of basalt could have proceeded. We rode for hours by the margin of a vast plain of basalt, stretching southward and westward as far as the eye could reach. It seemed as if the plain had been once a great lake or sea of molten rock which surged along the base of the hills, entering every valley, and leaving there a solid floor of...
Página 12 - Jukes-Browni22 says : It is also clear that it must be unsafe to draw conclusions as to the conditions under which any Paleozoic deposit was formed by assuming that the organisms whose fossil remains it contains had the same habits of life as their modern representatives.
Página 25 - ... grade. Many years ago it was extensively taken out to supply the old furnace on Decker's creek, where, in combination with other and better ores, it was successfully worked. Xo. 24 contains an irregular band about a foot thick which has never been tested. The Conglomerate, No. 21, is a curious stratum varying in thickness from a few inches to several feet. It is made up of fragments of limestone, sandstone, and iron ore, in size from fine sand to that of a man's head. These fragments are usually...
Página 130 - Isles," makes some very pertinent remarks upon this subject. He says: "From the proofs which have been adduced of the original wide extension of the Old Red Sandstone, it might be thought that the three principal basins could hardly have been separate lakes, but must have been inlets proceeding from one large inland sea, the greater part of which lay to the east of Scotland.
Página 118 - ... Aberdeen, and detached portions are found thirty or forty miles in the interior. Some of these outliers are bounded on one or more sides by faults, and probably owe their preservation to this circumstance, as will be referred to farther on in connection with the denudation of the Old Red Sandstone. The highest of them is that which runs up the valley of the River Avon above Tomintoul, where it reaches a height of upwards of 1300 feet above the sea. The coarseness of the conglomerate at this locality...
Página 71 - ... of Great End, Esk Pike, and Allen Crags) are unsucceeded by any conformable series of sedimentary rocks ; hence we know not how much of the products of the old volcano has been lost, and, for aught we know to the contrary, an Etna in size may have once stood where now are the resting-places of quiet lakes.
Página 220 - Burlescombe was the meeting-place of three distinct rivers or river currents, one coming from the north, one from the west, and one from the south.
Página 45 - ... and as the tides rise fifty feet and upwards, large areas are laid dry for nearly a fortnight between the spring and neap tides. In this interval the mud is baked in summer by a hot sun, so that it solidifies and becomes traversed by cracks, caused by shrinkage. Portions of the hardened mud between these cracks may then be taken up and removed without injury.
Página 223 - ... occur also in the upper division. Ordinary sandstones consist of more or less angular grains (see p. 8), and Mr. Phillips, after having examined a number of modern sands, states that " none of them, excepting such as had long been subjected to the wearing effects of wind action, were found to resemble those of the Milletseed sandstones in having all their grains reduced to a pebble-like form.