Lexicon
Intervals
Macrostrat
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Hemingfordian
416
Type
Age
Age range
18.6–16.3
Ma
International Timescale
Miocene
Burdigalian
North American Land Mammal Ages
Barstovian
Hemingfordian
Arikareean
North American Regional
Barstovian
Hemingfordian
Arikareean
18.7
18.6
18.5
18.4
18.3
18.2
18.1
18.0
17.9
17.8
17.7
17.6
17.5
17.4
17.3
17.2
17.1
17.0
16.9
16.8
16.7
16.6
16.5
16.4
16.3
16.2
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