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South Dakota
They first emerged in the Triassic Period (240 million years ago) and survived until the Cretaceous Period (65 million years ago)
The original color can be restored quickly by exposure to short-wave ultraviolet light
Stromatolites are fossilized layered microbial mats that formed in shallow
featuring classic cubic crustal formations with a soft glassy luster
Trilobite “Elrathia Kingi” | Antelope Springs, Utah | Cambrian cluster South DakotaTrilobites are an extinct class of marine arthropods that thrived for nearly 270 million years, from the early Cambrian to the end of the Permian period. Fossils of these creatures can be found across the globe, though this specimen was found in Utah. This item is 0. 5 x 0. 5 and weighs 0. 05oz
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