Sand under electron microscope.jpg

Summary[ ]

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.

Date not specified
Source http://mix.msfc.nasa.gov/abstracts.php?p=743
Author NASA
Permission
(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 JPL Image Use Policy.)
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