Houldjinian
Encyclopedia
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
.
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 Ergilian
Ergilian
The Ergilian age is a period of geologic time within the Late Eocene epoch of the Paleogene used more specifically with Asian Land Mammal Ages. It follows the Ulangochuian and precedes the Houldjinian age....
and precedes 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....
age.
The Houldjinian's lower boundary is the approximate base of the Priabonian
Priabonian
The Priabonian is, in the ICS's geologic timescale, the latest age or the upper stage of the Eocene epoch or series. It spans the time between and...
age. The Houldjinian age is named after the Houldjin gravel beds in Mongolia
Mongolia
Mongolia is a landlocked country in East and Central Asia. It is bordered by Russia to the north and China to the south, east and west. Although Mongolia does not share a border with Kazakhstan, its western-most point is only from Kazakhstan's eastern tip. Ulan Bator, the capital and largest...
.