Sand under electron microscope

Forfatter/Opretter:

NASA

Kredit:

http://mix.msfc.nasa.gov/abstracts.php?p=743

Shortlink:

https://dkwiki.dk/b/12f89

kilde:

Wikimedia Commons

størrelse:

270 x 210 Pixel (16138 Bytes)

beskrivelse:

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.

Licens:

Public domain

Kommentar på licensen:

US government, public domain