ܠܦܦܐ:Sand under electron microscope.jpg

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ܡܢ ܘܝܩܝܦܕܝܐ، ܐܝܢܣܩܠܘܦܕܝܐ ܚܐܪܬܐ

Sand_under_electron_microscope.jpg ‏(270 × 210 ܦܩܣܠ، ܥܓܪܐ ܕܠܦܦܐ: 16 KB، ܐܕܫܐ ܕ MIME: image/jpeg)

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Description 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.
ܣܝܩܘܡܐ not specified
ܡܒܘܥܐ http://mix.msfc.nasa.gov/abstracts.php?p=743
ܣܝܘܡܐ NASA
Permission
(Reusing this file)		 US government, public domain

ܦܣܣܐ

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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ܗܫܝܐ21:25, 28 ܒܢܝܣܢ 2006Thumbnail for version as of 21:25, 28 ܒܢܝܣܢ 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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