The Mercya Formation is a geologic formation located within Miocene, Pliocene and Pleistocene-aged rocks located in Florida. The formation was formed about 15 - 2 million years ago, when a drought killed the entire population of animals unique to Mercya.

The Mercya Formation overlies the Yansur Formation, a 66 million year old formaton in Florida and parts of Alabama, rich in dinosaur fossils in Alabama. The Mezozoic rocks left behind in Florida have since eroded.

Paleofauna

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Invertebrate paleofauna

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Insect paleofauna

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