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Rapakivi Texture in Rhyolite

Abstract

RAPAKIVI texture has rarely been reported in volcanic rocks1. A notable example of a volcanic body with rapakivi texture is a Miocene rhyolite2 that has an exposure area of about 1/16 square mile near California State Highway 178 on the east flank of Rhodes Hill 1/4 mile west of the eastern boundary of Death Valley National Monument. The body is covered by fan deposits to the south and south-east of the exposure, is in fault contact with Pre-Cambrian metamorphic rocks at its south and south-west boundary and is separated by an igneous breccia from Cambrian and Pre-Cambrian marine rocks along its north and north-west margin2.

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References

  1. Sederholm, J. J., Selected Works: Granites and Migmatites, 501 (Wiley, New York, 1967).

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  2. Noble, L. F., Wright, L. A., and Troxell, B. W., Geologic Map of California, Trona Sheet (1963).

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EHRREICH, A., WINCHELL, R. Rapakivi Texture in Rhyolite. Nature 224, 904–905 (1969). https://doi.org/10.1038/224904a0

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