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| View Original: | CalciteEchinosphaerites.jpg (3456x2634) | |||
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| Keywords: CalciteEchinosphaerites.jpg en Calcite crystals inside a test of the cystoid Echinosphaerites aurantium Middle Ordovician Estonia own Mark A Wilson Department of Geology The College of Wooster http //www3 wooster edu/geology/MWilson html 2011-01-11 Calcite Cystoidea fossils Echinosphaerites Fossils of Estonia Animals with black background Objects with black background | ||||
