Abstract
In central Oklahoma, particularly near the axis of the Nemaha uplift, the basement-rock surface slopes gently southward. It is approximately 1,220 m below the surface near the Kansas border and is 2,440 m deep near Oklahoma City. Denison (1966, 1981) classified the central Oklahoma basement rocks into the following four units: (1) Washington Volcanic Group, (2) Spavinaw Granite Group, (3) Osage Microgranite, and (4) Central Oklahoma Granite Group. The isotopic ages range from 1,150 to 1,270 million years, and these ages, when considered with analytical variations, indicate a main period of thermal activity about 1,200 million years ago.
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References
Denison, R. E., 1966, Basement rocks in adjoining parts of Oklahoma, Kansas, and Arkansas: unpublished Ph.D. dissertation, University of Texas, Austin, 292 p.
Denison, R. E., 1981, Basement rocks in northeastern Oklahoma: Oklahoma Geological Survey Circular 84, 84 p.
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© 1998 Springer Science+Business Media Dordrecht
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Luza, K.V. (1998). Seismicity and Tectonic Relationships of North Central Oklahoma. In: Hogan, J.P., Gilbert, M.C. (eds) Basement Tectonics 12. Proceedings of the International Conferences on Basement Tectonics, vol 6. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5098-9_34
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DOI: https://doi.org/10.1007/978-94-011-5098-9_34
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