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Intervals
Macrostrat
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Hemphillian
419
Type
Age
Age range
10.3–4.9
Ma
International Timescale
Pliocene
Zanclean
Miocene
Messinian
Tortonian
North American Land Mammal Ages
Blancan
Hemphillian
Clarendonian
North American Regional
Blancan
Hemphillian
Clarendonian
10.4
10.2
10.0
9.8
9.6
9.4
9.2
9.0
8.8
8.6
8.4
8.2
8.0
7.8
7.6
7.4
7.2
7.0
6.8
6.6
6.4
6.2
6.0
5.8
5.6
5.4
5.2
5.0
4.8
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