County: Marshall

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Photographer: John Charlton/KGS

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Short description: Sioux quartzite boulder in Marshall County. Quartzite boulders that litter hillsides in parts of northeastern Kansas were carried in from the north by glaciers about 700,000 years ago.

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Credit: This photo may be reproduced for non-commercial and educational purposes. When using this photo in a publication, website, or presentation, please credit Kansas Geological Survey. For information about use for commercial purposes, please contact the KGS editor.