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Article: AN UNUSUAL MIAROLITIC MINERAL ASSEMBLAGE FROM CENTRAL WISCONSIN.
- Article from:
- Rocks & Minerals
- Article date:
- May 1, 1999
CopyrightCOPYRIGHT 1999 Heldref Publications. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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AN UNUSUAL MIAROLITIC MINERAL ASSEMBLAGE FROM CENTRAL WISCONSIN. T.W. Buchholz(1), A.U. Falster(2), and W. B. Simmons(2). (1)1140 12th St. N., Wisconsin Rapids, WI 54494; (2)Dept. of Geology and Geophysics, University of New Orleans, LA 70148.
Cary Mound is a low hill that stands out in the flat to moderately rolling countryside of central Wisconsin. Several quarries on the mound exploit Early Proterozoic red granite and rhyolite, which have been dated at 1,833 [+ or -] 4 Ma (Sims et al. 1989). The granite and rhyolite appear to be comagmatic and may be related to an ancient caldera (G. L. LaBerge 1996, pers. com.). Surrounding rocks consist of early Proterozoic ...