Van Wikipedie
From [1] (there are other unidentified microshells that have not been uploaded to commons)
PD notice at [2]: These artificially colored images were originally put in the public domain in a very early AOL image library, circa 1995, by R. B., a teacher and electron micrographer, along with text files describing the images and providing an interesting introduction to the SEM.
Original caption:
- microshells in sand
- These tiny shells are found in sand and the ones imaged here and below are about double the size of salt grains.
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