RAGBRAI Geo-quiz th[removed]When the 1.7 billion year old Sioux Quartzite is used

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Date: 2012-07-16 17:21:41 Cedar Rapids metropolitan area Wapsipinicon River Mississippi River Maquoketa River Driftless Area Iowa Highway 64 Geography of the United States Iowa Anamosa Iowa		RAGBRAI Geo-quiz th[removed]When the 1.7 billion year old Sioux Quartzite is used Add to Reading List Source URL: ia.water.usgs.gov Download Document from Source Website File Size: 4,57 MB Share Document on Facebook

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