Hsandagolian
Encyclopedia
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
.
Oligocene
The Oligocene is a geologic epoch of the Paleogene Period and extends from about 34 million to 23 million years before the present . As with other older geologic periods, the rock beds that define the period are well identified but the exact dates of the start and end of the period are slightly...
epoch of the Paleogene
Paleogene
The Paleogene is a geologic period and system that began 65.5 ± 0.3 and ended 23.03 ± 0.05 million years ago and comprises the first part of the Cenozoic Era...
used more specifically with Asian Land Mammal Ages
Asian land mammal ages
The Asian Land Mammal Ages establishes a geologic timescale for prehistoric Asian fauna beginning 58.7 Mya during the Paleogene and continuing through to the Middle Pleistocene...
. It follows the Kekeamuan
Kekeamuan
The Kekeamuan age is a period of geologic time within the Early Oligocene epoch of the Paleogene used more specifically with Asian Land Mammal Ages. It follows the Houldjinian and precedes the Hsandagolian age....
and precedes the Tabenbulakian
Tabenbulakian
The Tabenbulakian age is a period of geologic time within the Oligocene epoch of the Paleogene used more specifically with Asian Land Mammal Ages. It follows the Ulangochuian age....
age.
The Ulangochuian's lower boundary is the approximate base of the Rupelian
Rupelian
The Rupelian is, in the geologic timescale, the older of two ages or the lower of two stages of the Oligocene epoch/series. It spans the time between and . It is preceded by the Priabonian stage and is followed by the Chattian stage....
age and upper boundary is the approximate upper base of the Aquitanian
Aquitanian
Aquitanian could refer to:*Aquitanian age, a geological age, the first stage of the Miocene Epoch*Aquitanian language, an ancient language spoken in the region later known as Gascony* Anything originating from Aquitaine, a region of France....
.