| Quaternary Surficial Deposits |
| Quaternary Volcanics |
| Boring Volcanic Field |
| Late High Cascade Volcanics |
| Early High Cascade Volcanics |
| Dalles Group |
| Idaho Group |
| Neogene sedimentary rocks |
| Willamette Group |
| Early Winema Volcanic Field |
| Harney Basin Volcanic Field |
| High Lava Plains Volcanic Province |
| Kivett Volcanics |
| Lake Owyhee Volcanic Field |
| McDermitt Volcanic Field |
| Neogene volcanic rocks |
| Oregon-Idaho Graben |
| Powder River Volcanic Field |
| Quaternary Winema Volcanic Field |
| Northern Nevada Volcanics |
| Strawberry Volcanics |
| Winema Volcanic Field |
| Columbia River Basalt Group |
| Coastal alkalic basalts |
| Coastal intrusives group |
| Hembre Ridge-Three Rivers Group |
| Yachats-Tillamook Group |
| Astoria Group |
| Coaledo-Cowlitz Group |
| Elkton-Yamhill Group |
| Keasey-Alsea Group |
| Nestucca-Hamlet Group |
| Tyee Group |
| Whalecove-Gnat Creek Group |
| Yaquina-Pittsburg Bluff Group |
| Early Western Cascade Volcanics |
| Goble Group |
| John Day/Clarno Group |
| Late Western Cascade Volcanics |
| Little Butte Volcanics |
| Paleogene volcanic rocks |
| Siletz Terrane |
| Mitchell Group |
| Myrtle Group |
| Paleogene sedimentary rocks |
| Nevadan intrusives |
| Applegate Group |
| Baker Terrane |
| Condrey Mountain Terrane |
| Gold Beach Terrane |
| Grindstone Terrane |
| Mountain Home Complex |
| Olds Ferry Terrane |
| Pickett Peak Terrane |
| Pueblo Mountain Metamorphic Complex |
| Sexton Mountain Terrane |
| Sixes River Terrane |
| Snow Camp Terrane |
| Umpqua Group |
| Wallowa Terrane |
| Western Klamath Terrane |
| Yolla Bolly Terrane |
