Hình:Borax ball.jpg

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Borax_ball.jpg (9 kB, định dạng MIME: image/jpeg)


Borax "cotton ball".

Original description:

Cotton balls are fibrous nodules of ulexite and proberite (sodium and calcium borate minerals) that form on the surface of some of Death Valley's salt pans. Cottonball Basin was the site of Death Valley's first borax production.

Public domain This image is in the public domain because it contains materials that originally came from the United States Geological Survey, an agency of the United States Department of Interior. For more information, see the official USGS copyright policy

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