Category:Igneous intrusions in Montana by geochronology

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States of the United States: Alaska · Arizona · California · Colorado · Idaho · Maine · Montana · Nevada · New Hampshire · New Jersey · New Mexico · New York · North Carolina · Oregon · Pennsylvania · Utah · Vermont · Virginia · Washington · Wyoming

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Precambrian	Phanerozoic Eon
Preceded by Proterozoic Eon	Phanerozoic Eon
	Paleozoic Era						Mesozoic Era			Cenozoic Era
	Cambrian	Ordovician	Silurian	Devonian	Carboniferous	Permian	Triassic	Jurassic	Cretaceous	Paleogene	Neogene	4ry

Subcategories

This category has the following 6 subcategories, out of 6 total.

C

Cenozoic igneous intrusions in Montana (1 C)
Cretaceous igneous intrusions in Montana (18 C)

M

Mesozoic igneous intrusions in Montana (1 C, 1 F)

P

Paleogene igneous intrusions in Montana (1 C)
Phanerozoic igneous intrusions in Montana (2 C)
Phanerozoic intrusions in Montana (empty)

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