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 appear Bagshot sands beds Bracklesham Brocchi Cader Idris calcareous Cambrian Canis character Chimæra cleavage planes cliffs coal coast conglomerate containing d'Orb deposits described Desh district elevation Eningen eruption evidence existing feet thick flora Forbes formation fossiliferous fossils fragments freshwater genus Geol Geological Society geologists Gothland granite greensand height hills igneous inches island land Lepidodendron limestone Lixouri Llandeilo London clay Lower Silurian Ludlow Lyell mass memoir miles Miocene Moel Hebog mountains nearly North Wales observed occur oolite organic remains Orthoceratite Pecten period phænomena plants porphyry portion Portland stone present Professor Sedgwick quarries R. I. Murchison range red sandstone region remarkable resembling ridges schist shale shells side Silurian rocks Silurian system slate slaty species specimens strata strike surface tertiary tion tracts Trilobites Upper Silurian vertical Wealden Wenlock whilst
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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 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. These fossil* shells, occurring in a deposit resembling the loess of the 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...
Seite xlvii - On the surface of the dried beds of red mud at Wolfville on the Bay of Fundy before mentioned, I observed many worm-like 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 Ornithicnites of high antiquity in the valley of the Connecticut before described.
Seite xxxvi - Geology,' and he there brought forward a division of the tertiary formations into four groups, founded on " the comparative proportion of living species of shells found fossil in each *," which he termed Eocene, Miocene, Older Pliocene, and Newer Pliocene. He adopts the same divisions in the second edition of his
Seite lxxxix - This carbonic acid mixed with water would spread with it over areas of different dimensions according to circumstances ; forming salts and meeting with the protoxide of iron in solution, it would unite with the protoxide and form a carbonate of iron. The carbonate of iron in solution would mingle with any fine detritus which might be held in mechanical suspension in the same water, and hence when the conditions for its deposit arose, which would happen when the needful excess of carbonic acid was...
Seite 422 - About this time fire issued forth, and gave rise to the great gulf, 'with such a force, noise, and shining light, that I, who was standing in my garden, was seized with terror. Forty minutes afterwards, although unwell, I got upon a neighbouring height, from which I saw all that took place, and by my troth it was a splendid fire. that threw up for a long time much earth and many stones, which fell...
Seite 139 - NW portion of the Welsh chain to be made up of the oldest fossiliferous masses ; but preferring a more comprehensive geographical name, he took that of
Seite lv - The author further declares, as his opinion, that " the abandonment of this doctrine would place in a very dubious position all evidence the palaeontologist could offer to the geologist, towards the comparison and identification of strata, and the determination of the epoch of their formation.
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.
Seite 177 - The former bottom of the ocean being now covered with a bad conductor of heat, instead of with a fluid which rapidly conveyed it away, the surface of uniform temperature will rise slowly but considerably, as is shown at GE, in number three. In number four, the first bed of the ocean AD, and its isothermal line GF, as well as the new bed, AC, of the ocean, and its corresponding isothermal line GE, are all shown at one view. 88. The newly-formed strata will be consolidated by the application of heat...