波爾多期(英語:Burdigalian)是中新世的第二個階段。其起止時間為20.44百萬年前和15.97百萬年前。
古新世至上新世的主要分層
-65 —
–
-60 —
–
-55 —
–
-50 —
–
-45 —
–
-40 —
–
-35 —
–
-30 —
–
-25 —
–
-20 —
–
-15 —
–
-10 —
–
-5 —
–
0 —
古新世至上新世的時間表
直軸:百萬年前
直軸:百萬年前
地層定義
物種
參考文獻
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