The Quarterly Journal of the Geological Society of London, Volumen 38Longman, Green, Longman, Roberts, & Green, 1882 |
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Otras ediciones - Ver todo
Términos y frases comunes
Ammonites aperture appear band basal beds Belemnites Benan Conglomerate Blackdown bones Brachiopoda British Bryozoa calcareous calices Cambrian Carboniferous centim Chalk character cliffs coast containing Coral Rag Corallian corallum Cornbrash deposits described Devonian Dimyaria distal district division Egoceras Eichw England Eocene fauna feet formation fossiliferous fossils fragments Gasteropoda genera genus Geol Geological géologique Girvan Graptolitic gravel grey grits Headon Hill horizon Inferior Oolite Journ Judd Jurassic Jurassic rocks Kellaways Rock Kimmeridge Clay limestone localities Lower Lias marine marls mass Middle Lias miles Monomyaria Ornithopsis Oxford Clay Palæozoic paper pass Permian plate Plesiosaurus Polyzoa present Prof quarry Quart radial Red Sandstone represented Rhætic ridge sand seen septa shales shells Silurian Smittia Society species occur specimens Stinchar stones strata surface Taconic thickness tubes Ueber Upper Lias vertebræ Wenlock Yorkshire Zoarium zone
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Página 400 - The speaker insisted upon the fact that where newer strata are in unconformable contact with older ones, the effect of lateral movements of compression, involving the two series, is generally to cause the newer and more yielding strata to dip towards, and even beneath the edges of the older rock, a result due to folds, often with inversion, sometimes passing into faults. This phenomenon throws much light on the supposed recency of many crystalline schists.
Página 401 - Rensselaer, and Washington; and after passing out of the State, they are found stretching through the whole length of Vermont, and into Canada as far north as Quebec. It is, however, in Massachusetts, in the county of Berkshire, that we find the most satisfactory exhibition of these rocks.
Página 61 - ... crushing of portions of that shell, which compressions and crushings are themselves produced by the more rapid contraction by cooling of the hotter material of the nucleus beneath that shell, and the consequent more or less free descent of the shell by gravitation, the vertical work of which is resolved into tangential pressures and motion within the shell.
Página 30 - NE, he found that the quartz had got pounded into smaller grains, and the larger pebbles were chiefly of felsite, which here formed the shore, while further towards Bangor fragments of the still higher Bangor volcanic series helped to make up the Cambrian shingle-beach. 3. " Description and Correlation of the Bournemouth Beds. — Part II. Lower or Freshwater Series.
Página 152 - Cruden to which the shelly gravel seems to be confined is bounded on the east by the sea, on the south by a...
Página 502 - Dcuttrosaurus, and various Labyrinthodont and Reptilian remains. Upon these the author remarked that the list of plants has a Palaeozoic aspect, while the Reptilian remains seem to be more of a secondary character. After consideration of all the facts, the author came to the conclusion that possibly some of the beds in the central part of what is known as the Permian basin may be passage-beds between the Permian and Trias, but that the Kargalinsk series includes the uppermost beds of the Permian.
Página 239 - Dwarf birches, alders seven or eight feet high, with stems three inches in diameter and a luxuriant growth of herbage, including numerous very toothsome berries, grew with the roots less than a foot from perpetual solid ice. The formation of the surrounding country shows no high land or rocky hills, from which a glacier might have been derived and then covered with debris from their sides. The continuity of the mossy surface showed that the ice must be quite destitute of motion...
Página 323 - Canhami, spec. nov. Plate iv., figs. 2a — 2c. Guard hastate, terminating in an acute, sub-mucronate, central point ; contracted in the medio-alveolar region ; compressed...
Página 133 - On the Correlation of the Upper Jurassic Rocks of England with those of the Continent." By the Rev. JF Blake, MA, FGS Part I. The Paris Basin. This was an attempt to settle the many questions of correlation arising...