Image of the Week - October 19, 2004

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Aragonite Needles

ESEM image of aragonite (CaCO3) "needles" growing from a calcite (CaCO3) crystal base on a stainless steel washer substrate. The crystals shown in this image precipitated from Mammoth Hot Springs in Yellowstone National Park over a 48-hour period.

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Uploaded Tue Oct 19 09:17:34 2004 by Scott Jay Robinson

Updated Tue Feb 2 10:17:31 2010 by Daniel E. Weber