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Uintacrinus socialis, Crinoids, sea lilies or feather-stars, fossils embedded in a limestone matrix, Cretaceous age (144 to 65 million years ago), photo: Chip Clark, Smithsonian Institution

Uintacrinus socialis, Crinoids, sea lilies or feather-stars, fossils embedded…

Crinoid fossil. This is an actual fossil, but the sort of thing that could be laser engraved if done properly.

The marine invertebrates called crinoids filled the seas during the Carboniferous period and even earlier. Their fossils are frequently found in limestone from the period, giving the Carboniferous the nickname the "Age of the Crinoids.

Fossil starfish  | In #China? Try www.importedFun.com for award winning #kid's #science |

Fossil starfish | In #China? Try www.importedFun.com for award winning #kid's #science |

Very cool!

fossil hunting (only where it's legal) in Montana, North Dakota and Washington. Fun for all ages.

Dinosaurs.  Prehistoric Pangaea.

The Supercontinent Pangaea of the Triassic Period - A map of the Earth around 250 to 200 million years ago featuring Gondwanna, Laurasia and Pangaea the Supercontinent. Populated with Dinosaurs, Therapsids, Pterosaurs, and other prehistoric beasts.

A beautiful fossil sand dollar. This is an echinoderm, a group of animals that…

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