 | Henry Woodward - Geology - 1891 - 634 pages
...ure Palaeozoic in North America, Miocene in the Caucasus. 2. There is no relation to volcanic action. 3. The most productive areas for oil in great quantity...where the strata are comparatively undisturbed. Oil, hut in less abundance, frequently occurs when the strata are highly disturbed and contorted, but gas... | |
 | Charles Edward Groves, William Thorp, William Joseph Dibdin - Chemistry, Technical - 1895 - 442 pages
...Palseozoic in North America, Miocene in the Caucasus. 2. There is no relation to true volcanic action. 3. The most productive areas for oil in great quantity...found. 4. The main requisites for a productive oil- or gas-field are a porous reservoir (sandstone or limestone) and an impervious cover. 5. Both in comparatively... | |
 | Henry Woodward - Geology - 1891 - 658 pages
...are Palaeozoic in North America, Miocene in the Caucasus. 2. There is no relation to volcanic action. 3. The most productive areas for oil in great quantity...found. 4. The main requisites for a productive oil- or gas-field are a porous reservoir (sandstone or limestone) and an impervious cover. 5. Both in comparatively... | |
 | British Association for the Advancement of Science - Science - 1892 - 1258 pages
...Palseozoic in korth America, Miocene in the Caucasus. U. There is no relation to true volcanic action. 3. The most productive areas for oil in great quantity...found. 4. The main requisites for a productive oil- or gas-field are a porous reservoir (sandstone or limestone) and an impervious cover. 5. Both in comparatively... | |
 | British Association for the Advancement of Science - Science - 1892 - 1146 pages
...Palseozoic in North America, Miocene in the Caucasus. '2. There is no relation to true volcanic action. 3. The most productive areas for oil in great quantity...found. 4. The main requisites for a productive oil- or gas-field are a porous reservoir (sandstone or limestone) and an impervious cover. 6. Both in comparatively... | |
 | David Christopher Davies - Mines and mineral resources - 1892 - 488 pages
...in North America, and Miocene, in the Caucasus. 1 2. There is no relation to true volcanic action. ' 3. The most productive areas for oil in great quantity...undisturbed. Oil, but in less abundance, frequently occurs where the strata are highly disturbed and contorted, but gas is rarely so found. ' 4. The main requisites... | |
 | Geology - 1892 - 742 pages
...Palaeozoic, in North America; Miocene, in the Caucasus. 2. There is no relation to volcanic action. 3. The most productive areas for oil in great quantity...are where the strata are comparatively undisturbed. 4. The main requisites for a productive oil- or gas-field are a porous reservoir (sandstone or limestone)... | |
 | Charles Edward Groves, William Thorp, William Joseph Dibdin - Chemistry, Technical - 1895 - 430 pages
...PaUeozoic in North America, Miocene in the Caucasus. 2. There is no relation to true volcanic action. 3. The most productive areas for oil in great quantity...found. 4. The main requisites for a productive oil- or gas-field are a porous reservoir (sandstone or limestone) and an impervious cover. 5. Both in comparatively... | |
 | Sir Boverton Redwood - Natural gas - 1896 - 478 pages
...oil in great quantity are when the strata are comparatively undisturbed. Oil, but in less abun.lance, frequently occurs when the strata are highly disturbed and contorted; but gas is rarely so found." 1 Brit. Aasoc. Rep., 1891. (4) "The main requisites for a productive oil, or gas-field, are a porous... | |
 | Geology - 1914 - 874 pages
...and New Worlds. Mr. Topley says, among other things — "1. The most productive areas for oil and gas in great quantity are where the strata are comparatively...disturbed and contorted, but gas is rarely so found. " 2. The main requisites for a productive oil or gas field are a porous reservoir (sandstone or limestone)... | |
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The main requisites for a productive oil- or gas-field are a porous reservoir (sandstone or limestone) and an impervious cover. 5. Both in comparatively undisturbed and in highly disturbed areas, an anticlinal structure often favours the accumulation... 
