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92:
17:
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44:
82:
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76:
61:
48:
32:
This category has the following 2 subcategories, out of 2 total.
8:
22:Category:Quaternary System of North America
18:Category:Paleogene System of North America
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34:
26:
14:
93:Cenozoic Erathem of North America
58:Pliocene Series of North America
45:Miocene Series of North America
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109:
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16:See also the preceding
83:Neogene North America
20:and the succeeding
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5:
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88:Neogene System
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29:Subcategories
28:
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77:Categories
62:(14 P)
49:(44 P)
38:0–9
79::
60:
47:
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