Dead Virgularia mirabilis, Sweden, showing the pattern similar to the virgularia trace fossil. Source: http://v3.boldsystems.org/index.php/Taxbrowser_Taxonpage?taxid=726281
v mirabilis coral
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A Blog About Stone Gathering, Tumbling and Polishing, and Rocks and Landscapes, from New Zealand – With Musical Interludes (john.tumblestone@gmail.com)