The Houldjinian age is a period of geologic time (37.2—33.9 Ma) within the Late Eocene epoch of the Paleogene used more specifically with Asian Land Mammal Ages. It follows the Ergilian and precedes the Kekeamuan age.

The Houldjinian's lower boundary is the approximate base of the Priabonian age. The Houldjinian age is named after the Houldjin gravel beds in Mongolia. [1][2]

  1. ^ Paleo Database: Houldjinian
  2. ^ Meng, Jin; Wang, YuanQing; Nik, Xijun, Beard, Christopher K.; Sun, Chengkai; Li, Qian; Jin, Xun; and Bai, Bin. [1]

Paleogene period
Paleocene epoch
Eocene epoch
Oligocene epoch
Danian | Selandian
Ypresian | Lutetian
Bartonian | Priabonian
Rupelian | Chattian
Geological time spiral

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