Glacial quartzite cobble, pre-Kansas till showing plough strikes and disc harrow gouges

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Iron oxides (rust spots) mark where the stone was hit by ploughs whilst laying in a field. Disc harrow gouges make long deep scratch marks. Fairly rare, pre-Kansas till rock gives insight to ancient ice ages.

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Size: 5184px × 3456px
Location: Wilson, Minnesota, USA
Photo credit: © Lyroky / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: age, ancient, cobble, drift, geological, geology, glacial, ice, minnesota, quartz, quartzite, sample, transport