The Quarterly Journal of the Geological Society of London, 19±ÇThe Society, 1863 Vols. 1-108 include Proceedings of the society (separately paged, beginning with v. 30) |
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xxxvi ÆäÀÌÁö
... marked by the unconformity of an upper formation to one immediately underlying it , or , when such visible unconformity is wanting , by a sudden change in the fossils characteristic of the underlying and overlying formations ; and I ...
... marked by the unconformity of an upper formation to one immediately underlying it , or , when such visible unconformity is wanting , by a sudden change in the fossils characteristic of the underlying and overlying formations ; and I ...
xlvi ÆäÀÌÁö
... marked break in organic succession . There is thus reason to believe that , if our Upper Silu- rian strata were in contact with the Lower Devonian rocks of Devon and Cornwall , the same broken relations would exist between them ; for ...
... marked break in organic succession . There is thus reason to believe that , if our Upper Silu- rian strata were in contact with the Lower Devonian rocks of Devon and Cornwall , the same broken relations would exist between them ; for ...
3 ÆäÀÌÁö
... marked concentric interruptions , or ruga of growth . The vertical ridges or partitions are very thin , and number about 300 all round the circumference . Examined with the lens , one perceives in the interseptal cells very thin and ...
... marked concentric interruptions , or ruga of growth . The vertical ridges or partitions are very thin , and number about 300 all round the circumference . Examined with the lens , one perceives in the interseptal cells very thin and ...
4 ÆäÀÌÁö
... marked on the flattened side than on the remainder of the surface . The tubercles are often connected together by their bases , und seem then to be derived from parallel keels or longitudinal ribs . The neck of the spine is large and ...
... marked on the flattened side than on the remainder of the surface . The tubercles are often connected together by their bases , und seem then to be derived from parallel keels or longitudinal ribs . The neck of the spine is large and ...
7 ÆäÀÌÁö
... marked , radiating ribs ; the space between the ribs is almost entirely smooth . Nothing can be seen on it besides some lines of growth , which are hardly perceptible to the naked eye . The ears are small , triangular in shape , and ...
... marked , radiating ribs ; the space between the ribs is almost entirely smooth . Nothing can be seen on it besides some lines of growth , which are hardly perceptible to the naked eye . The ears are small , triangular in shape , and ...
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abundant Ammonites angle Anthracosaurus Antigua appear beds calices Cambrian carapace Carboniferous character clay clay-slate Coal-measures colour conglomerate containing corallites Corals Crustacean delta deposits described Devonian diameter district east Estheria Eurypterus feet formation fossils fragments genera genus Geol Geological Society geologists glaciers Glen Roy gneiss granite Graptolites gravel greenish-grey grey greywacke hill Huronian inch Journ Lake limestone Loch Lower Ludlow margin marl mass mica-slate micaceous miles mineral Miocene nearly noticed occur Old Red Sandstone Oolite organic remains Permian plate Poaka Poaka Beck portion present probably Prof Quart quartzite R. I. Murchison Ragstone Rhynchonella ridge river rocks sand schist Scotland seen septa shales shells side Silurian Skiddaw slates species specimens stone strata stream surface teeth Tertiary thickness thin tion transverse unconformity Upper Lias valley valves vertebr©¡
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170 ÆäÀÌÁö - P. pileiformis, M'Chesney, Descr. of New Species of Fossils from the Palaeozoic Rocks of the Western States of America, p. 40, 1849. P. Cora, Dav., Mon. Carb. Brach. pi. 36. fig. 4, pi. 42. fig.
xliv ÆäÀÌÁö - geology or palaeontology are able to show to the contrary, a Devonian fauna and flora in the British Islands may have been contemporaneous with Silurian life in North America, and
xx ÆäÀÌÁö - To promote researches concerning the mineral structure of the earth, and to enable the Council of the Geological Society to reward those individuals of any country by whom such researches may hereafter be made,"—" such individual not being a Member of the Council." 1831. Mr. William Smith. 1835. Dr. GA Mantell. 1836. ML Agassiz.
xlii ÆäÀÌÁö - Break very nearly complete both in genera and species, and probable unconformity. Tremadoc Slate. Break very nearly complete both in genera and species, and probable unconformity. Llandeilo and Caradoc beds. Large break, especially in species, and probable unconformity. Lower Llandovery beds. Break and
221 ÆäÀÌÁö - Hull, E. The Coal-fields of Great Britain; their history, structure, and resources; with notices of the coal-fields of other parts of the world.
468 ÆäÀÌÁö - Among the Reptilian remains found in erect trees at the South Joggins, there have occurred several portions of skeletons, •which, from their sculptured cranial bones, plicated teeth, and the forms of their scales and limb-bones, I have referred to the genus Dendrerpeton, but to individuals of much smaller size than the full-grown specimens of
xlii ÆäÀÌÁö - unconformity. Wenlock Shale, &c. Each of these breaks, in my opinion, necessarily implies a lost epoch, stratigraphically quite unrepresented in our area, and the life of which is only 'feebly represented in some cases by the fossils common to the underlying and overlying formations. But
323 ÆäÀÌÁö - the strata of deltas, and calculations formed from local superficial deposits. I myself have seen the bricks which formed the foundation of a house I had built carried away, and strewed along the bottom of a river at a depth of 30 or 40 feet below the level of the country.
263 ÆäÀÌÁö - will show that, on the whole, the remains of any given animal, if abundant, are not confined to one spot in the cave, but are pretty evenly distributed, and lie large with small, the more with the less dense, not in the least degree sorted by water. There is no evidence of the Bear succeeding to the
64 ÆäÀÌÁö - for at least 750 geographical miles, and covering an area fully equal to that of France, that, as it appears to me, a record ought to be preserved of these borings. Southward, at the Rio Colorado, the Pampean formation meets the great Tertiary formation of Patagonia; and northward, at