Naknek Formation

{{Unreferenced|date=May 2025}}

{{Infobox rockunit

| name = Naknek Formation

| image = Novarupta.png

| caption = Naknek Formation under Novarupta, Katmai National Park, Alaska

| type = Geological formation

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The Naknek Formation is a Mesozoic geologic formation. Plesiosaur remains are among the fossils that have been recovered from its strata.