Sepulcher Formation

{{Short description|Geological Formation}}

{{Infobox rockunit

| name = Sepulcher Formation

| image = Fossil redwood tree trunk (probably Metasequoia) (Sepulcher Formation, Eocene; "Petrified Tree", Yellowstone National Park, Wyoming, USA) 18 (13460418925).jpg

| caption = Fossil redwood tree trunk from the Sepulcher Formation

| type = Formation

| age = Paleogene

| period = Paleogene

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| region = Wyoming

| country = United States

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| unitof = Washburn Group

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The Sepulcher Formation is a geologic formation in Wyoming. It preserves fossils dating back to the Paleogene period.