Miocene
Geologic period
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The Miocene is the first geological epoch of the Neogene Period and extends from about 23.03 to 5.333 million years ago. Wikipedia
Period: Neogene
Occurred: 23.03 million years ago - 5.333 million years ago
Ages: Aquitanian, Burdigalian, Langhian, and more
Lower boundary definition: Base of magnetic polarity chronozone C6Cn.2n; FAD of the Planktonic foraminiferan Paragloborotalia kugleri
Lower GSSP ratified: 1996
Upper boundary definition: Base of the Thvera magnetic event (C3n.4n), which is only 96 ka (5 precession cycles) younger than the GSSP