Cretaceous Sea Urchin Pendant Necklace Size:Small This necklace features a fragment

This necklace features a fragment of Libyan Desert Glass set in sterling silver

Gainesville: University Press of Florida

but some small pieces from that time remained in chondritic meteorites like Allende

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The area covered by this shower

Cretaceous Sea Urchin Pendant Necklace Size:Small This necklace features a fragmentAbove: Artist's Concept of the Tethys Sea during the Cretaceous (Source: Mini Museum) Ancient sea urchins, small and spiny creatures, have existed for millennia. These echinoids first appeared in oceans 450 million years ago, where they fed on algae and sponges. Their flexible spines purpose was two fold: to protect against predators and allow for the slow crawl towards the urchins next meal. Buried for millions of years, their fossils appear in many