List of fossiliferous stratigraphic units in Oregon
# List of fossiliferous stratigraphic units in Oregon

This article contains a list of fossil-bearing stratigraphic units in the state of Oregon, U.S.

## Lists of fossiliferous stratigraphic units

### Cenozoic

| Group | Formation | Period |
| - | - | - |
| | Elk River Formation | Pleistocene Irvingtonian |
| | Port Orford Formation | Middle Pleistocene |
| | Merced Formation | Plio-Pleistocene |
| | Empire Formation | Tortonian-Zanclean |
| | Alkali Canyon Formation | Hemphillian |
| | Chalk Butte Formation | Hemphillian |
| | Drewsey Formation | Hemphillian |
| | McKay Formation | Hemphillian |
| | Juntura Formation | Clarendonian |
| | The Dalles Formation | Clarendonian |
| | Butte Creek Formation | Barstovian |
| | Deer Butte Formation | Barstovian |
| | Sucker Creek Formation | Barstovian |
| | Mascall Formation | Hemingfordian-Barstovian |
| | John Day Formation John Day Fossil Beds National Monument | Late Eocene-Early Miocene (Duchesnean-Hemingfordian) |
| | Nye Formation | Chattian-Burdigalian (Arikareean-Hemingfordian) |
| Astoria | Astoria Shale | Oligocene |
| | Scotts Mills Formation | Chattian |
| | Yaquina Formation | Chattian |
| | Alsea Formation | Rupelian (Whitneyan) |
| | Fisher Formation | Rupelian |
| | Mehama Formation | Early Oligocene |
| | Pittsburg Bluff Formation | Priabonian-Chattian |
| | Keasey Formation | Priabonian-Rupelian |
| | Eugene Formation | Priabonian |
| | Nestucca Formation | Bartonian-Priabonian |
| | Spencer Formation | Bartonian |
| | Coaledo Formation | Bartonian |
| | Cowlitz Formation | Bartonian |
| | Clarno Formation John Day Fossil Beds National Monument | Bridgerian-Duchesnean |
| | Tyee Formation | Ypresian-Lutetian |
| Umpqua | Camas Valley Formation | Ypresian |
| Umpqua | Flournoy Formation | Lutetian |
| Umpqua | Lookingglass Formation | Ypresian |
| Umpqua | Roseburg Formation | Ypresian |
| Umpqua | White Tail Ridge Formation | Ypresian |
| Umpqua | Tenmile Formation | Ypresian |
| Umpqua | Bushnell Rock Formation | Ypresian |
| | Yamhill Formation | Ypresian-Priabonian |
| | Siletz River Volcanics | Selandian-Ypresian |

### Mesozoic

| Group | Formation | Period |
| - | - | - |
| | Cape Sebastian Sandstone | Campanian |
| | Chico Formation | Santonian-Campanian |
| | Hudspeth Formation | Albian |
| | Days Creek Formation | Valanginian-Barremian |
| Myrtle | Myrtle Formation | Valanginian-Hauterivian |
| Myrtle | Dothan Formation | Berriasian-Valanginian |
| | Otter Point Formation | Tithonian-Berriasian |
| | Coon Hollow Formation | Oxfordian |
| | Lonesome Formation | mid Callovian |
| | Weberg Formation | Bajocian |
| | Snowshoe Formation | Toarcian-Bathonian |
| Mowich | Hyde Formation | early Toarcian |
| Mowich | Nicely Formation | late Pliensbachian |
| Mowich | Robertson Formation | late Pliensbachian |
| Mowich | Suplee Formation | late Pliensbachian |
| | Graylock Formation | Hettangian |
| | Hurwal Formation | Norian |
| | Martin Bridge Limestone | Carnian-Norian |
| | Vester Formation | Carnian-Norian |
| | Rail Cabin Argillite | Norian |
| | Brisbois Member | Carnian |
| Aldrich Mountains | Fields Creek Formation | Ladinian-Norian |

### Paleozoic

| Group | Formation | Period | Notes |
| - | - | - | - |
| | Coyote Butte Limestone | Sakmarian-Kungurian | |
