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
appear Archean argillite basin beaches beds biotite Black Hills bowlder clay Calciferous Cambrian Canada Cañon Carboniferous character conglomerate contain creek Cretaceous crystalline schists Cuboides Dawson deposits described Devonian dikes division drift east eastern elevation erosion evidence fact fault fauna feet feldspar fissures foliation formation fossils fragments Geol Geological Survey geologists glacial glaciers gneiss grains granite graptolites gravel Hall horizon hornblende Hudson River island Lake Superior Laramie later Laurentian Lévis limestone lithological locality lower mass metamorphism mica mica schists miles moraine movement northern observed occur origin Paleozoic parallel pebbles plains portion pre-Cambrian present probably Professor quartz quartzites region Report ridges rocks Rocky Mountain sand sandstone sandstone dikes schistose schists sediments shales shore side Silurian slates slope species specimens strata stratigraphical stream structure surface terraces Tertiary thickness tion Trenton unconformity upper valley western Yukon zone
Popular passages
Page 525 - There is, then, no alternative but to accept the results that a Tertiary flora was contemporaneous with a Cretaceous fauna, establishing an uninterrupted succession of life across what is generally regarded as one of the greatest breaks in geological time.
Page 455 - ... 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 7 - AMERICA. ARTICLE II OBJECT The object of this Society shall be the promotion of the Science of Geology In North America. ARTICLE III MEMBERSHIP The Society shall be composed of Fellows, Correspondents, and Patrons.
Page 525 - 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 94 - ... operators of each new field, to the effect that Nature will not fail to perpetually maintain or perpetually renew the supplies which we find so delightfully adapted to our comfort and service. So far as we are concerned, it is certain that Nature has done about all that she is going to do in this line. In her great laboratory, a thousand years are as a single day. 3. No doctrine could exert a more healthful influence on the communities that are enjoying the inestimable advantages of the new fuel...
Page 106 - Tes-lin-too occupies a continuation of the Yukon (Lewes) valley proper has been clearly recognized by Dawson, as is shown by the following quotation : " The valley near the mouth of the Tes-lin-too is again narrower than usual, singularly so for the point of confluence of two important rivers. The valley of the Tes-lin-too is evidently the main orographic depression which continues that occupied by the Lewes below the confluence. The Lewes flows in through a narrow gap, closely bordered by high hills...
Page 478 - ... clay at the level of the railway where the cut reaches bed-rock, thus proving that the region has been submerged.
Page 4 - Both ends were reached by a compromise which provided that the "original members" of the geological society must be active workers or teachers of geology, who were either members or fellows of the Association; but, that after January 1, 1889, other persons would be eligible. The compromise further provided that a summer meeting should always be held at the same time and place as the meeting of the Association; but * the business meeting of the society was to be during the winter holidays. The meeting...
Page 90 - ... limestone! The answer is not as full and definite as may be expected, certainly not as may be desired. There is but one datum in the development of a gas field in which the normal gas pressure can be ascertained, and that is when the first well reaches the reservoir and releases the long-imprisoned and greatly compressed gas. But often this favorable opportunity is lost, and gauges are not applied to wells until the energy of the first flow is somewhat abated. Again, different wells in the same...
Page 546 - Slope," published in the American Journal of Science early iu 1888, fa distinctive late Tertiary formation, well displayed on the Appomattox river in eastern Virginia, was defined and named after that river, and its principal characters, its distribution, its stratigraphic relations, and its probable age were briefly recorded. The formation was then known to consist of a series of predominantly orange-colored non-fossiliferous sands and clays, resting unconformably upon Miocene and older formations,...