Category:Geologic formations in Oregon

• Geologic formations in Oregon by geochronology (18 C)

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• Columbia River Basalt Group (14 C, 1 P, 45 F)
• Columbia River Basalt Group in Oregon (9 C, 14 F)
• Geologic groups in Oregon (5 C)

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• Scientific articles regarding geologic formations in Oregon (21 C)
• Stratigraphic columns of Oregon (1 F)

A

• Alkali Canyon Formation (1 C)
• Alsea Formation (1 C)
• Astoria Formation (1 C, 1 F)

B

• Brisbois Formation (1 C)

C

• Cape Sebastian Sandstone (1 C, 1 F)
• Chalk Butte Formation (2 C)
• Chico Formation (4 C, 1 F)
• Chief Joseph Dike Swarm (1 F)
• Coaledo Formation (1 C)
• Coon Hollow Formation (1 C)
• Cowlitz Formation (5 F)
• Coyote Butte Limestone (1 C)

D

• Deer Butte Formation (1 C)
• Deschutes Formation (1 F)
• Dothan Formation (1 C)
• Drewsey Formation (1 C)

E

• Eagle Creek Formation (OR-WA) (1 C)
• Elk River Formation (1 C)
• Empire Formation (1 C, 2 F)
• Eugene Formation (U.S. geology) (1 C)

F

• Fossil bearing geologic formations in Oregon (38 C)

G

• Gable Creek Formation (1 C)
• Ginkgo Basalt (3 C, 2 F)
• Grande Ronde Basalt (18 F)
• Grayback Pluton (1 F)

H

• Haystack Valley Member (1 F)
• Hudspeth Formation (1 C)
• Hyde Formation (1 C, 1 F)

I

• Imnaha Basalt (2 F)

J

• Geologic formations of John Day Fossil Beds National Monument (3 F)

K

• Keasey Formation (1 C, 1 F)

L

• Larch Mountain Andesite (1 C)
• Leslie Gulch Tuff (1 C, 2 F)

M

• Martin Bridge Limestone (1 C)
• Mazama Ash (6 C, 1 F)
• McKay Formation (1 C)
• Merced Formation (U.S. geology) (3 C, 1 F)
• Monument Dike Swarm (1 F)

N

• Nestucca Formation (2 C)
• Nicely Formation (geology) (1 C)
• Northern Nevada Rift Dikes (1 F)

O

• Otter Point Sandstone (Oregon) (1 C)

P

• Pittsburg Bluff Formation (1 C)

R

• Rail Cabin Argillite (1 C)
• Rhyolite tuff of Smith Rock (2 F)
• Roseburg Formation (1 C, 1 F)

S

• Siletz River Volcanics (2 F)
• Snowshoe Formation (1 C)
• Spencer Formation (1 C)
• Steens Basalt (2 C, 1 F)
• Steens Dikes (1 F)
• Sucker Creek Formation (2 C)

T

• Tillamook Formation (1 F)
• Touchet Formation (10 F)
• Turtle Cove Formation (1 C, 2 F)
• Tyee Sandstone (1 C, 1 F)

V

• Vester Formation (1 C, 1 F)

Y

• Yachats Basalt (3 C, 2 F)
• Yakima Basalt (1 C)
• Yamill Formation (1 C)