Category:Geologic formations of the United States by geochronology

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Countries of North America: Mexico · United States of America^‡
^‡: partly located in North America

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Geologic time scale

Subcategories

This category has the following 35 subcategories, out of 35 total.

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Fossil bearing geologic formations in the United States by geochronology‎ (27 C)

A

Archean formations in the United States‎ (5 C)

C

Cambrian formations in the United States‎ (22 C, 1 F)
Carboniferous formations in the United States‎ (8 C)
Cenozoic formations in the United States‎ (8 C)
Cretaceous formations in the United States‎ (25 C, 1 F)

D

Devonian formations in the United States‎ (26 C, 3 F)

E

Eocene formations in the United States‎ (5 C)

H

Holocene formations in the United States‎ (3 C)

J

Jurassic formations in the United States‎ (13 C, 1 F)

M

Mesozoic formations in the United States‎ (7 C)
Mesoarchean formations in the United States‎ (1 C)
Mesoproterozoic formations in the United States‎ (2 C)
Miocene formations in the United States‎ (6 C, 1 F)

N

Neoarchean formations in the United States‎ (2 C)
Neogene formations in the United States‎ (6 C)
Neoproterozoic formations in the United States‎ (3 C)

O

Oligocene formations in the United States‎ (2 C)
Ordovician formations in the United States‎ (18 C)

P

Paleogene formations in the United States‎ (7 C)
Paleocene formations in the United States‎ (3 C)
Paleoproterozoic formations in the United States‎ (7 C)
Paleozoic formations in the United States‎ (12 C)
Pennsylvanian formations in the United States‎ (16 C)
Permian formations in the United States‎ (4 C)
Phanerozoic formations in the United States‎ (8 C)
Pleistocene formations in the United States‎ (12 C)
Pliocene formations in the United States‎ (8 C)
Precambrian formations in the United States‎ (10 C)
Proterozoic formations in the United States‎ (6 C)

Q

Quaternary formations in the United States‎ (5 C)

S

Silurian formations in the United States‎ (7 C)

T

Triassic formations in the United States‎ (18 C, 1 F)

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