Geological Magazine, Volume 5Henry Woodward Cambridge University Press, 1868 |
Other editions - View all
Common terms and phrases
acid agate Albian Ammonites animals appears Aptian beds bones Boulder-clay Brachiopoda British Carboniferous chalcedony Chalk character chemical Chillesford clay cliff coast containing coprolite coral Cretaceous crust Crustacea denudation deposits described Devonian district Dolgelly Drift earth elevation Eocene epoch evidence existence fauna feet figured flints Forbes formation fossil genera genus Geol GEOLOGICAL MAGAZINE Geological Society geologists Glacial granite Graptolites gravel Greensand igneous inches Journ land Lias limestone Lingulella London Clay Lower M'Coy marine mass matter mineral Miocene Museum Norfolk North observed occur Oolite origin paper period Plate Pliocene polypary portion present probably Professor quartz recent Red Crag referred remains remarkable reptiles ridges rivers rocks Salter sand Sandstone seen shales shells side Silurian slate species specimens stone strata structure Suffolk surface teeth Tertiary thickness tion Trilobites Upper Upware valley valve Xenacanthus zone
Popular passages
Page 298 - There is a river in the ocean: in the severest droughts it never fails, and in the mightiest floods it never overflows; its banks and its bottom are of cold water, while its current is of warm; the Gulf of Mexico is its fountain, and its mouth is in the Arctic Seas. It is the Gulf Stream. There is in the world no other such majestic flow of waters. Its current is more rapid than the Mississippi or the Amazon, and its volume more than a thousand times greater.
Page 298 - Gulf Stream water, while the other half is in common water of the sea, so sharp is the line and such the want of affinity between those waters, and such too the reluctance, so to speak, on the part of those of the Gulf Stream to mingle with the common water of the sea.
Page 455 - ... these thoughts I chanced to meet Mr. Nathaniel Thayer, whom I have ever found a generous friend to science. The idea of appealing to him for a scheme of this magnitude had not, however, occurred to me ; but he introduced the subject, and, after expressing his interest in my proposed journey, added, " You wish, of course, to give it a scientific character ; take six assistants with you, and I will be responsible for all their expenses, personal and scientific.
Page 515 - MAGAZINE for November last. As summed up by Mr. Shaler, the second hypothesis supposes that the earth "consists of an immense solid nucleus, a hardened outer crust, and an intermediate region of comparatively slight depth, in an imperfect state of igneous fusion.
Page 235 - ... author adverted to the theory of the change of isothermal surfaces within, the earth, an account of which he had published in the Society's ' Proceedings ' for 1834, as affording the necessary explanation of the causes which had produced the changes of climate in the district of the Parallel Roads. 2. " On the origin of smoothed, rounded, and hollowed surfaces of Limestone, and Granite.
Page 424 - On the Vegetation of the Carboniferous Period as compared with that of the present day," published in 1848, was an important contribution to the science.
Page 355 - The only complete and systematic statement of the doctrine of Evolution with which I am acquainted is that contained in Mr. Herbert Spencer's 'System of Philosophy...
Page 299 - Water, therefore, in this case carries from the tropics for distribution upwards of 1500 units of heat, or 1,158,000 foot-pounds. According to the above estimate of the size and velocity of the stream, 5,575,680,000,000 cubic feet of water are conveyed from the Gulf per hour, or 133,816,320,000,000 cubic feet daily.
Page 247 - The amount of such material annually transported to the sea by some of the larger rivers of the globe has been the subject of careful measurement and calculation. Much has been written of the vastness of the yearly tribute of silt borne to the ocean by such streams as the Ganges and Mississippi. But, as was first pointed out by Mr. Tylor, "the mere consideration of the number of cubic feet of detritus annually removed from any tract of land by its rivers does not produce so striking an impression...
Page 336 - That the debris was deposited by land-floods, and that the mode of deposition was quite distinct from that of moraines produced by the melting of ice. (2) That the character of the deposits in the valleys of the Aire, Taff, and Rhonda proves that they were formed under similar conditions. (3) That these gravel-beds point to a Pluvial period of great intensity and duration. (4) That the iceaction of which there is evidence was subordinate to the aqueous action. (5) That the fossiliferous Quaternary...