Oregon Water Resources Department
Groundwater Information System Mapping Tool

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DOGAMI Geology

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Faults

Folds

Geologic polygon contact lines

Group/Terrane

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

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