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Cincinnetina (Resserella) meeki  Liberty Formation Ordovician_Brachiopods

Cincinnetina (Resserella) meeki Liberty Formation Ordovician_Brachiopods

A fossil of an orb-weaving spider.

A fossil of an orb-weaving spider.

Perfectly preserved for more than 300 million years, this horsetail carries secrets from the Carboniferous period. Primitive vascular plants, horsetails (genus Equisetum) are often found in coal deposits

10 Weirdest Fossils

Perfectly preserved for more than 300 million years, this horsetail carries secrets from the Carboniferous period. Primitive vascular plants, horsetails (genus Equisetum) are often found in coal deposits

Very cool!

Very cool!

Paleozoic Mesozoic Cenozoic

Paleozoic Mesozoic Cenozoic

Fossilised T-Rex teeth.

Fossilised T-Rex teeth.

This fossil immortalizes stingray sex of the Eocene. The male and female fat-tailed stingrays (Asterotrygon maloneyi) shown here were likely mating or just about to mate when they were killed, researchers believe.

Lost World Locked in Stone at Fossil Lake

This fossil immortalizes stingray sex of the Eocene. The male and female fat-tailed stingrays (Asterotrygon maloneyi) shown here were likely mating or just about to mate when they were killed, researchers believe.

Many species of insects are found in the Green River Formation including dragonflies. The wetland margins of Fossil Lake provided ideal breeding and foraging opportunities. View more Green River insect fossils. National Park Service - Fossil Butte National Monument photograph.

Many species of insects are found in the Green River Formation including dragonflies. The wetland margins of Fossil Lake provided ideal breeding and foraging opportunities. View more Green River insect fossils. National Park Service - Fossil Butte National Monument photograph.

Uintacrinus fossil (a crinoid, 65 million years old); from http://selectivefocusphotography.blogspot.com/search?q=fossils

Uintacrinus fossil (a crinoid, 65 million years old); from http://selectivefocusphotography.blogspot.com/search?q=fossils

Can you find all the Tyrannosauruses? Fossil Hunting by Amanda Makepeace - Free to download on deviantART.

Can you find all the Tyrannosauruses? Fossil Hunting by Amanda Makepeace - Free to download on deviantART.

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