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Description The Ordovician cystoid Echinosphaerites (an extinct echinoderm) from northeastern Estonia; approximately 5 cm in diameter.
Date 2007-10-21 (original upload date)
Source Photograph taken by Mark A. Wilson (Department of Geology, The College of Wooster).
Author Original uploader was Wilson44691 at en.wikipedia
( Reusing this file)

Released into the public domain (by the author).


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