. Early geophysical papers of the Society of Exploration Geophysicists . Fig. 10. Long Beach Dome. The numbers opposite well locations represent feet per degree Fahrenheit, 100-2000 feet. Causes of Temperature Variations Depth to the crystalline rocks and flow of heat along the strata appear to be possible explanations of the close relationship that apparently exists be- tween the isotherms and the general trend of the strata in central Oklahoma (See Fig. 2). A similar explanation may apply at Salt Creek, which is an exceptionally well defined local uplift. Steep dips occur on the western side
. Early geophysical papers of the Society of Exploration Geophysicists . Fig. 10. Long Beach Dome. The numbers opposite well locations represent feet per degree Fahrenheit, 100-2000 feet. Causes of Temperature Variations Depth to the crystalline rocks and flow of heat along the strata appear to be possible explanations of the close relationship that apparently exists be- tween the isotherms and the general trend of the strata in central Oklahoma (See Fig. 2). A similar explanation may apply at Salt Creek, which is an exceptionally well defined local uplift. Steep dips occur on the western side of the field (See Figs. 3 and 5) and very hard granite was found by The Midwest Re- fining Company at a depth of 5420 feet near the top of the dome in the 1/4 1/4, sec. 35, T. 40 N., R. 79 W. This evidence suggests the pos- sibility that the depth to the granite is least on top of the dome, and that the direct contact of the granite with the hot crystalline rocks at great depths serves to maintain lines of flow from an almost inexhaustible heat source to the top of the dome. Additional evidence in substantiation of this conclusion is to be found in the fact that the values of l/b vary from 1°F in about 29 feet on top of the dome to 1°F in about 56 feet in Sec. 15, T. 40 N., R. 79 193
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