Geological Magazine, Volum 3,Part 4 -Volum 4;Volum 24Henry Woodward Cambridge University Press, 1887 |
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angle appears Archæan augite Bagshot band beds Bernissartia bones Boulder-clay Cambrian Carboniferous Chalk character Chert Chondrosteus Coal-measures Crag Cretaceous crystalline Ctenacodon Culm Measures deposits described diorite distinct district Dollo dorsal drift dykes elegans Eocene Euphoberia evidence fauna feet felspar figured floras foliation formation fossils fragments gabbro Gault genera genus Geol Geological geologists glacial glacier gneiss granite gravel Greensand grey grits Hill hornblende ice-sheet igneous Iguanodon Lake latter Lias limestone London Clay lower margin Marl mass metamorphic miles mineral Miocene moraine North observed occur Ordovician origin paper pebbles plates porphyritic portion posterior premolars present probably Prof referred remarkable resemblance ridge rocks sand Sandstone schists Scudder seen serpentine shales side silica Silurian siphuncle species specimen spines strata structure surface suture Tertiary thickness Upper valley veins vertebræ Wealden whorl zone
Passatges populars
Pàgina 186 - as an acknowledgment of eminent services in any department of Geology, irrespective of the receiver's country ; but he must not be older than 45 years at his last birthday, thus probably not too old for further work, and not too young to have done much.
Pàgina 424 - Smith, in consideration of his being a great original discoverer in English geology; and especially for his having been the first, in this country, to discover and to teach the identification of strata, and to determine their succession by means of their imbedded fossils...
Pàgina 303 - ... glass can be drawn into very fine fibres, we have made some observations on the tenacity of this material, comparing the strength of very thin threads with that of rods made from the same glass, but of much greater thickness. . The experiments were carried out in the course of our work in the Physical Laboratory of the Normal School of Science and Royal School of Mines. In dealing with a substance so brittle as glass, it is evident that special care must be taken to ensure that the observation...
Pàgina 30 - Hills up to a height of 1300 feet in the form of mounds and hummocks. South and east of this long moraine no signs of glaciation were discovered, while north and west of it there is every evidence of a continuous ice-sheet covering land and sea alike. The...
Pàgina 314 - Outlines of the Geology of England and Wales,' by Conybeare and Phillips, published in 1822, they state, p.
Pàgina 24 - ... are generally rounded by subsequent corrosion. The principal accessory minerals are biotite and enstatite. The biotite is in crystals, often more or less rounded, and sometimes surrounded by a thin black rim, due to corrosion. Similar black rims surround biotite in many basalts. The biotite crystals are usually twinned according to the base. The enstatite is clear and non-pleochroic. Garnet and ilmenite also occur, the former sometimes surrounded by biotite, and the latter often partly altered...
Pàgina 426 - MAGNIFICENT COLLECTION, accompanied by remarks dictated by long experience and a sound judgment." He (Gilbertson) had proposed to publish on the C'rinoidea himself, but his sketches as well as his specimens were all placed at Prof. Phillips's disposal. Phillips adds — " An attentive examination of this rich collection rendered it unnecessary to study minutely the less extensive series preserved in other cabinets .... most of the figures of fossils are taken from specimens in Mr. Gilbertson's Collection,...
Pàgina 107 - In view of the bank's approval of the security offered and in the absence of any evidence to the contrary, it is fair to assume that the Beards will be able to obtain any necessary extension of the bank commitment.
Pàgina 424 - For six years he was the resident engincer of the canal, and, applying his previouslyacquired knowledge, he was enabled to prove that the strata from the New Red Marl (Trias) upwards followed each other in a regular and orderly succession, each bed being marked by its own characteristic fossils, and having a general tendency or 'dip' to the south-east. To verify his theory he travelled in subsequent years over the greater part of England and Wales, and made careful observations of the geological...
Pàgina 29 - This great moraine, filled with fartravelled northern erratics, is heaped up in hummocks and irregular ridges, and is in many places as characteristically developed as anywhere in America. It has none of the characters of a sea-beach, although often containing broken shells brought from the Irish Sea. It may be followed from the extreme end of the Lleyn Peninsula (where it is full of Scotch granite erratics), in a north-easterly direction through Carnarvonshire...