Bulletin of the Geological Society of America, Volume 1The Society, 1890 Vols. for 1938-61 include as pt. 2 of the December issue the Society's Abstracts, later published separately. |
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Common terms and phrases
Alaska appear Archean basin beaches beds Black Hills bowlder clay Cambrian Canada Carboniferous character Chuar clastic coast Colorado conglomerates contains creek Cretaceous crystalline schists Dawson débris deposits depth described Devonian dikes drift east eastern elevation erosion evidence fact fault fauna feet feldspar fold formation fossils fragments Geol Geological Survey geologists glacial glaciers gneiss Grand Cañon granite gravel Hall hornblende Hudson River island Jurassic Lake Superior Laramie later Laurentian Leda clay limestone lithological locality lower mass material metamorphism mica mica-schists miles moraine mouth movement northern observed occur origin Paleozoic parallel pebbles Pleistocene portion pre-Cambrian present probably Professor quartz quartzites range region Report ridges rocks Rocky Mountain sandstone schistose schists sediments shales shore side Silurian slates slopes species strata stream structure surface terraces Tertiary thickness tion Trenton tundra unconformity upper valley western Winchell Yukon
Popular passages
Page 449 - ... of the Mississippi valley, while independent of the six species identical with Chazy and Calciferous forms, there are many others closely allied to those found in the latter formation in Canada. From the physical structure alone no person would suspect the break that must exist in the neighborhood of Quebec, and without the evidence of the fossils, every one would be authorized to deny it.
Page 15 - It Is believed that the following theorem or working hypothesis Is worthy of consideration and of comparison with additional facts : Mountains, mountain ranges, and valleys of magnitude equivalent to mountains, exist generally In virtue of the rigidity of the earth's crust; continents, continental plateaus, and oceanic basins exist In virtue of Isostatic equilibrium In a crust heterogeneous as to density.
Page ix - Constitution : ARTICLE I.— NAME. This Society shall be known as THE GEOLOGICAL SOCIETY OF AMERICA. ARTICLE II. -OBJECT. The object of this Society shall be the promotion of the Science of Geology in North America. ARTICLE III.— MEMBERSHIP. SECTION 1.
Page 562 - SFO. 2. The President shall discharge the usual duties of a presiding officer at all meetings of the Society and of the Council. He shall take cognizance of the acts of the Society and of its officers, and cause the provisions of the Constitution and By-Laws to be faithfully carried into effect.
Page 515 - Most of these 1 described in the annals of the New York Lyceum of Natural History in 1869. I called this flora Tertiary, and made it Miocene because I identified in it many species of plants collected on Mackenzie river, in Greenland, Spitzbergen, and various European localities described by Professor Oswald Herr in his Flora Fonsilis Arctira, and called there Miocene, but since shown by Mr.
Page 131 - Nevada at a height of ten to twelve thousand feet above the sea. There is no line of perpetual snow on any portion of the Arctic regions known to explorers. The snow disappears every summer, not only from the low, sandy shores and boggy tundras, but also from the tops of the mountains, and all the upper slopes and valleys with the exception of small patches of drifts and avalanche-heaps hardly noticeable in general views. But though nowhere excessively deep or permanent, the snow-mantle is universal...
Page 513 - AND 15ICLL. 523 His principal record was made by his reports to the state geologist of Pennsylvania, but he published many papers in the transactions of the American Institute of Mining Engineers, of which he was a zealous member and officer ; as also of the American Philosophical Society, American Society of Mechanical Engineers, Academy of Natural Sciences, American Geological Society, and American Association for the Advancement of Science. JPL Some general announcements were made, after which...
Page 76 - ... It trends into an inlet among the hills, oblique to the general direction of the ancient coast. Driving along the top of the ridge, which is scarcely wider than the road, it is seen to be composed of constantly and suddenly alternating stretches, each quite level, the one set being about twenty-five feet above the other. These so-called osars form a very limited proportion of the gravel ridges of this group. The term kame (the Scotch vernacular for gravel hill), according to its use in America,...
Page ix - Society shall be a President, two Vice-Presidents, a Secretary, and a Treasurer, who, with three Fellows, shall form an Executive Council. 2. These shall be chosen annually by the Society at large. 3. The duties of these officers shall be those usually performed by officers thus named in scientific societies. 4. No Fellow shall hold the office of President or Vice-President for more than two years in succession.
Page 531 - Archean axis, and had originally tho form of a great cross, with one arm penetrating the crystalline schists, while two others stretched north and south along the junction of these with the newer sedimentaries, and the fourth extended itself over the flat-lying Devonian to the west.