File:Sand under electron microscope.jpg
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Sand_under_electron_microscope.jpg (270 × 210 pixels, file size: 16 KB, MIME type: image/jpeg)
Summary
Grains of so-called “Ottawa Silica Sand” under an electron microscope. Magnification 150x. “Ottawa Sand” is a by-product of hydraulic mining of Ordovician orthoquartzites of the St. Peter Sandstone Formation of the Paleozoic intracratonic Illinois Basin.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 06:30, 8 January 2017 | | 270 × 210 (16 KB) | 127.0.0.1 (talk) | <p>Grains of so-called “Ottawa Silica Sand” under an electron microscope. Magnification 150x. “Ottawa Sand” is a by-product of hydraulic mining of Ordovician orthoquartzites of the St. Peter Sandstone Formation of the Paleozoic intracratonic Illinois Basin. </p> |
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