Prospective Oil Fields at Upton, Weston County, Buck Creek, Niobrara County, Rattlesnake Mountains, Natrona County, La Barge, Lincoln County, Issue 5

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State of Wyoming, Geologist's Office, 1913 - Geology - 15 pages
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Page 9 - Cretaceous ages lie against the granite core at an angle of about thirty degrees from the horizontal, while the rocks of Tertiary age abut against and overlap the edges of the Cretaceous. (See Section on Plate IV.) EVIDENCES OF OIL Along the outcrops of the Cretaceous rocks (from Dakota to Mesa Verde), deposits of asphaltum mark the location of former oil springs, and at many places oil saturated sandstones stand out in prominent ledges. What particular members of the Cretaceous series were the original...
Page 10 - Range 113 W., in Lincoln County, on the west side of Green River and to the north of La Barge Creek. The range of hills, of which La Barge Mountain is the highest peak, bounds it on the west. Oil was discovered seeping from the Tertiary sandstones on the flat east of La Barge Mountain in 1907. Since that time many oil locations have been made in the vicinity, and many prospect holes bored. No hole has been put —11— —12— down over a thousand feet, however, and oil in quantity has not been...

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