Category:Geologic formations in Oregon

• Geologic formations in Oregon by geochronology‎ (18 C)
• Geologic formations of John Day Fossil Beds National Monument‎ (9 C, 3 F)

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• Columbia River Basalt Group‎ (15 C, 1 P, 45 F)
• Columbia River Basalt Group in Oregon‎ (8 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)
• Clarno Formation‎ (5 C, 5 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 (36 C)

G

• Gable Creek Formation‎ (1 C)
• Ginkgo Basalt‎ (3 C, 2 F)
• Grande Ronde Basalt‎ (6 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

• John Day Formation‎ (7 C, 10 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)
• Mascall Formation‎ (4 C, 6 F)
• 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

• Picture Gorge Ignimbrite‎ (1 F)
• Pittsburg Bluff Formation‎ (1 C)

R

• Rail Cabin Argillite‎ (1 C)
• Rattlesnake Formation‎ (3 C, 5 F)
• 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 (8 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)