Lexicon
Intervals
Macrostrat
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Blancan
420
Type
Age
Age range
4.9–1.8
Ma
International Timescale
Pleistocene
Calabrian
Gelasian
Pliocene
Piacenzian
Zanclean
North American Land Mammal Ages
Irvingtonian
Blancan
Hemphillian
North American Regional
Irvingtonian
Blancan
Hemphillian
5.0
4.8
4.6
4.4
4.2
4.0
3.8
3.6
3.4
3.2
3.0
2.8
2.6
2.4
2.2
2.0
1.8
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