The Hsandagolian age is a period of geologic time (33.9—23.03 Ma) within the Oligocene epoch of the Paleogene used more specifically with Asian Land Mammal Ages. It follows the Kekeamuan and precedes the Tabenbulakian age. The Ulangochuian's lower boundary is the approximate base of the Rupelian age and upper boundary is the approximate upper base of the Aquitanian. Image:Geological time spiral.png This Geochronology-related article is a stub. You can help Fossil Wiki by [ expanding it].
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