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Sand_under_electron_microscope.jpg (270 × 210 pixels, file size: 16 KB, MIME type: image/jpeg)

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Summary

ᏄᏍᏛ ᏗᎧᏃᏗ 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.
ᎢᎦ not specified
ᏅᏓᏳᏓᎴᏅᎯ http://mix.msfc.nasa.gov/abstracts.php?p=743
ᏧᏬᏪᎳᏅᎯ NASA
ᏗᏓᎵᏍᎪᎸᏓᏁᎯ
(Reusing this file)		 US government, public domain

Licensing

Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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ᎢᎦ/ᎠᏟᎢᎵᏒᎤᏍᏗ ᏓᏟᎶᏍᏛᎢDimensionsᎬᏗᏍᎩᏍᏆᎳ ᎪᏪᎵ
current21:25, 28 ᎧᏩᏂ 2006Thumbnail for version as of 21:25, 28 ᎧᏩᏂ 2006270 × 210 (16 KB)Holly Cheng{{Information | Description=Sand under an electron microscope. | Source=http://exploration.nasa.gov/articles/06dec_dunes.html | Date=not specified | Author=NASA | Permission=US government, public domain }}

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