Bulletin of the Geological Society of America, Band 3The Society, 1892 Vols. for 1938-61 include as pt. 2 of the December issue the Society's Abstracts, later published separately. |
Inhalt
| 3 | |
| 13 | |
| 23 | |
| 32 | |
| 44 | |
| 50 | |
| 55 | |
| 56 | |
| 231 | |
| 232 | |
| 253 | |
| 254 | |
| 263 | |
| 274 | |
| 280 | |
| 283 | |
| 83 | |
| 109 | |
| 121 | |
| 152 | |
| 153 | |
| 154 | |
| 163 | |
| 173 | |
| 174 | |
| 180 | |
| 183 | |
| 188 | |
| 197 | |
| 204 | |
| 217 | |
| 229 | |
| 301 | |
| 328 | |
| 331 | |
| 369 | |
| 383 | |
| 395 | |
| 413 | |
| 445 | |
| 453 | |
| 455 | |
| 457 | |
| 472 | |
| 478 | |
| 533 | |
| 534 | |
Andere Ausgaben - Alle anzeigen
Häufige Begriffe und Wortgruppen
albite anticlinal basin beds belt Belt creek black earth bluff bowlders calcareous Cambrian cancrinite Carboniferous character Chonophyllum clay Coal Measures coral creek Cretaceous deposits described Devonian dolomite eastern eleolite elevation englacial drift epoch erosion exposures fault fauna feet feldspar figure formation forms fossils genus Geol Geological Survey geologists glacial glauconite grains granite gravel gray Hall horizon ice-sheet inches Jurassic lake lavas layers limestone linearis Llano Estacado localities lower margin masses Mesozoic miles Minnesota moraine mount Jura mountain northern occur Oolite outcrop Paleozoic paper plateau plates portion present probably Professor quartzite region ridge river rocks Saint Saint Peter sand sandstone sandy Sardeson Scolithus seam septa shales side Silurian slates slope sodalite southern southward species specimens strata structure surface Taylorville Tertiary thickness thin tion Trenton Trias Triassic unconformity upper valley western Winchell
Beliebte Passagen
Seite 204 - In the manufacture of glass, of which there is an immense quantity made in Pittsburg, I am informed that gas is worth much more than the cost of coal and its handling, because it improves the quality of the product. One firm in Pittsburg is already making plate glass of the largest size, equal to the best imported French glass, and is enabled to do so by this fuel.
Seite 205 - The writer's study of this subject began in June, 1883, when he was employed by Pittsburg parties to make a general investigation of the natural gas question with the special object of determining whether or not it was possible to predict the presence or absence of gas from geological structure. In the prosecution of this work, I was aided by a suggestion from Mr. William A. Earseman, of Allegheny, Pennsylvania, an oil operator of many years...
Seite 46 - The nodular ore is characterized by the nodular character of the component parts of the ore beds, though it also occurs in mammillar, stalactitic or botryoidal masses. The nodules are often, and in some places generally, hollow, representing geodes, and vary from a fraction of an inch to several feet in diameter.
Seite 205 - Pennsylvania, an oil operator of many years' experience, who had noticed tliat the principal gas wells then known in western Pennsylvania were situated close to where anticlinal axes were drawn on the geological maps. From this he inferred there must be some connection between the gas wells and the anticlines. After visiting all the great gas wells that had been struck in western Pennsylvania and West Virginia, and carefully examining the geological surroundings of each, I found that every one of...
Seite 206 - Very fair gas wells may also be obtained for a considerable distance down the slopes from the crests of the anticlinals, provided the dip be sufficiently rapid, and especially if it be irregular or interrupted with slight crumples. And even in regions where there are no well marked anticlinals if the dip be somewhat rapid and irregular, rather large gas wells may occasionally be found, if all other conditions are favorable.
Seite 323 - The strata here dip to the north , the coal passing under the barren sandstones and shales which form the falls of the Missouri, and all the bedded rocks are concealed by drift as far as observation has extended northward of the river.
Seite 209 - ... failure to grasp this fact is the principal reason why Mr. Ashburner insists upon his readers believing that a great gas well may be obtained in a syncline ; for it is quite certain that no large gas well has ever yet been found in the trend of a...
Seite 205 - This new fuel, which bids fair to replace coal almost entirely in many of our chief industrial centers, has not received that attention from the geologist which its importance demands. So far as the writer is aware, nothing has been published on the subject which would prove of any value to those engaged in prospecting for natural gas, and it is the existence of this blank in geological literature that has suggested the present article. " Practically all the large gas wells struck before 1882 were...
Seite 206 - Probably very few or none of the grand arches along mountain ranges will be found holding gas in large quantity, since in such cases the disturbance of the stratification has been so profound that all the natural gas generated in the past would long ago have escaped into the air through fissures that traverse all the beds.
Seite 288 - St. Louis and lying between the '' black shale "• and the Burlington limestone have much closer affinities with those of the overlying strata than with those below, and therefore that the rocks in question properly belong to the lower Carboniferous series. The name " Kinderhook " was then proposed for the formation.