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Intervals
Macrostrat
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Barstovian
417
Type
Age
Age range
16.3–13.6
Ma
International Timescale
Miocene
Serravallian
Langhian
Burdigalian
North American Land Mammal Ages
Clarendonian
Barstovian
Hemingfordian
North American Regional
Clarendonian
Barstovian
Hemingfordian
16.4
16.2
16.0
15.8
15.6
15.4
15.2
15.0
14.8
14.6
14.4
14.2
14.0
13.8
13.6
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