| Geology, Economic - 1917 - 400 pages
...white bands. (See Pis. XI and XIII.) The shale that yields the most oil when subjected to distillation is that which weathers into massive benches of grayish-blue...former, being resistant, weathers to projecting ledges. (See PI. XIV, A.) Some of the very rich beds show a vitreous luster similar to that of coal. The massive... | |
| Victor Ziegler - Petroleum - 1918 - 174 pages
...gray, bluish gray, and white bands. The shale that yields the most oil when subjected to distillation is that which weathers into massive benches of grayish-blue color but which is dark brown to SPENT 5HALE SHALE CRUSHER (6 inch) AMMONlA WATER OILS, COMBUSTIBLEOA5E5 AMMONlA «' WATER VAPOR WATER... | |
| DORSEY HAGER - 1919 - 286 pages
...gray, bluish-gray, and white bands. The shale that yields the most oil when subjected to distillation is that which weathers into massive benches of grayish-blue...former being resistant, weathers to projecting ledges. Some of the very rich beds show a vitreous luster similar to that of coal. The massive shale is exceedingly... | |
| Dorsey Hager - Petroleum - 1919 - 282 pages
...gray, bluish-gray, and white bands. The shale that yields the most oil when subjected to distillation is that which weathers into massive benches of grayish-blue...former being resistant, weathers to projecting ledges. Some of the very rich beds show a vitreous luster similar to that of coal. The massive shale is exceedingly... | |
| Geology - 1920 - 144 pages
...partly furnished the bitumen to the shales where their skeletons are preserved. Whenever I had tune to search for them, I have scarcely failed to find...resistant, weathers to projecting ledges. The massive sha\e is exceedingly tough, resists erosion to a remarkable degree, and weathers bluish white. Fragments... | |
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