| Applegate Group |
| Astoria package |
| Baker terrane |
| Boring volcanic field |
| Coaledo-Cowlitz package |
| Coastal alkalic basalts* |
| Coastal intrusions* |
| Columbia River Basalt Group |
| Condrey Mountain terrane |
| Dalles package |
| Elkton-Yamhill package |
| Goble package |
| Gold Beach terrane |
| Harney Basin volcanic field |
| High Lava Plains volcanic province |
| Idaho Group |
| John Day-Clarno package |
| Keasey-Alsea package |
| Little Butte Volcanics |
| Mitchell package |
| Mountain Home complex* |
| Myrtle Group |
| Neogene sedimentary rocks |
| Neogene volcanic rocks |
| Nestucca-Hamlet package |
| Nevadan intrusions |
| Olds Ferry terrane |
| Oregon-Idaho graben |
| Paleogene sedimentary rocks |
| Paleogene volcanic rocks |
| Pickett Peak terrane |
| Powder River volcanic field |
| Pueblo Mountain metamorphic complex* |
| Quaternary surficial deposits |
| Quaternary volcanics |
| Sexton Mountain terrane |
| Siletz terrane |
| Sixes River terrane |
| Snow Camp terrane |
| Strawberry Volcanics |
| Tyee package |
| Umpqua Group |
| Wallowa terrane |
| Whale Cove-Gnat Creek package |
| Willamette package |
| Winema volcanic field |
| Yachats-Tillamook package |
| Yaquina-Pittsburg Bluff package |
| Yolla Bolly terrane |
| early High Cascade Volcanics |
| early Western Cascade Volcanics |
| late High Cascade Volcanics |
| late Western Cascade Volcanics |
| silicic rocks of Yellowstone hotspot |
| western Klamath terrane |
