The Quarterly Journal of the Geological Society of London, Band 3The Society, 1847 Vols. 1-108 include Proceedings of the society (separately paged, beginning with v. 30) |
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angle anticlinal appears Bagshot sands beds Bracklesham Cader Idris calcareous Cambrian character cleavage planes cliffs coal coast containing d'Orb deposits depth described Desh district elevation Eningen eocene eruption evidence existing feet thick Forbes formation fossiliferous fossils fragments freshwater genus Geol Geological Society geologists Gothland granite gravel greensand height hills igneous inches island land limestone Llandeilo London clay Lower Silurian Ludlow marine mass memoir miles Miocene Moel Hebog mountain nearly northern Nummulites observed occur oolite organic remains Orthoceratite paleozoic Pecten perforated period phænomena porphyry portion Portland stone present Professor Sedgwick quarries R. I. Murchison range region remarkable resembling schists shale shells side Silurian rocks Silurian system slates slaty species specimens strata structure supposed surface temple tertiary tion tracts Trilobites Upper Silurian valley vertical volcanic Wealden Wenlock whilst whole
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Seite lxxxv - Isles," published in 1846, in the first volume of the " Memoirs of the Geological Survey of Great Britain," attracted universal attention. On the coasts of the British Islands, Forbes distinguishes four zones or regions, the Littoral (between...
Seite 104 - ... the planes of cleavage and foliation are intimately connected with the planes of different tension, to which the area was long subjected, after the main fissures or axes of upheavement had been formed, but before the final consolidation of the mass and the total cessation of all molecular movement.
Seite lxv - This, indeed, must be taken for granted, if the idea of species (as most naturalists hold) involves the idea of the relationship of all the individuals composing it, and their consequent descent from a single progenitor, or from two, according as the sexes might be united or distinct...
Seite xlii - ... or cliffs, bounding the great valley, and therefore older in date, and which are from 50 to 250 feet in perpendicular height, consist in great part of loam containing land, fluviatile, and lacustrine shells of species still inhabiting the same country.
Seite 210 - In consequence of this variation, and also in consequence of the covering up of the bottom of the sea by the detritus of the land, the surfaces of equal temperature within the earth are continually changing their form, and exposing thick beds near the exterior to alterations of temperature. The expansion and contraction of these strata may form rents and veins, produce earthquakes, determine volcanic eruptions, elevate continents, and possibly raise mountain chains.
Seite xlii - Rhine, are associated with the bones of the mastodon, elephant, tapir, mylodon, and other megatherioid animals ; also a species of horse, ox, and other mammalia, most of them of extinct species. The loam rests at Vicksburg and other places on eocene or lower tertiary strata, which in their turn, repose on cretaceous rocks.
Seite lxi - There could not always have been such a separating abyss between Northern Europe and Boreal America as now divides them. The sea through a great part, must have been a shallow sea; and somewhere, probably to the far north, there must have been either a connection or such a proximity of land, as would account for the transmission of a non-migratory terrestrial and a literal marine fauna.
Seite lxii - ... the transmission of a non-migratory terrestrial and a literal marine fauna." In another part of his memoir, he says, "Although I have made ice-bergs and ice-floes the chief agents in the importation of flora southward, I cannot but think, that so complete a transmission of that flora as we find on the Scottish mountains, was aided, perhaps mainly, by land to the north, now submerged.
Seite xlvii - ... 1838. I have already alluded to such impressions of raindrops in speaking of the ripplemarked flags of the New Red sandstone at Newark in New Jersey." " On the surface of the dried beds of red mud at Wolfville on the Bay of Fundy before mentioned, I observed many wormlike tracks, made by Annelides which burrow in the mud ; and, what was still more interesting to me, the distinct footmarks of birds in regular sequence, faithfully representing in their general appearance the smaller class of Ornithichnites...
Seite lxix - ... odour, and leave, when dissolved in acids, a large but varying residue, of which the greater part consists of sand. These concretions often unite into irregular strata; and over very large tracts of country, the entire mass consists of a hard, but generally cavernous marly rock : some of the varieties might be called calcareous tuffs.