Category:Geologic formations of the United States

• Geologic formations of the United States by state (49 C)

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• Rock formations of the United States (16 C, 13 P)

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• Geologic formations of Puerto Rico (3 C, 12 P)

C

• Conglomerate formations of the United States (152 P)

D

• Dolomite formations of the United States (120 P)

M

• Mesozoic United States (23 C)
• Mudstone formations of the United States (135 P)

S

• Siltstone formations of the United States (177 P)

T

• Tuff formations of the United States (41 P)

Σ

• United States geologic formation stubs (4 C, 152 P)

B

• Biscayne Aquifer
• Black Belt (geological formation)

C

• Cokedale Formation

F

• Fossil Hill Member
• Frontier Formation

H

• Hell Creek Formation
• Hosselkus Limestone

L

• Lake Waco Formation

M

• Menefee Formation
• Mineralogy of the Pikes Peak Region
• Morrison Formation

N

• Nanjemoy Formation

O

• Ojo Alamo Formation
• Old Red Sandstone

P

• Pajarito Formation

S

• Shadow Lake Formation
• St. Marys Formation
• Syracuse Formation

T

• Tioga Bentonites
• Tres Hermanos Formation
• Tullock Member

W

• Wasatch Formation
• Wells Creek Dolomite
• White River Formation
• Willwood Formation