Click to enlargeEarth's Crust Cretacous Tertiary Boundary Dust

5.5" x 2"

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Chatter-patterned area of Mid-Atlantic Ridge rock slurry framed by speckled area of sediment core containing the iridium anomaly from an asteroid that hit Earth about 65 million years ago. Back has Earth crust slurry. Lavender glaze assembled from refined materials. Center of sea-glass.