Agenian
Encyclopedia
The Agenian age is a period of geologic time (23.8—20 Ma) within the Miocene
used more specifically with European Land Mammal Ages
. It follows the Orleanian
age and overlaps the Aquitanian
and Burdigalian
ages.
Miocene
The Miocene is a geological epoch of the Neogene Period and extends from about . The Miocene was named by Sir Charles Lyell. Its name comes from the Greek words and and means "less recent" because it has 18% fewer modern sea invertebrates than the Pliocene. The Miocene follows the Oligocene...
used more specifically with European Land Mammal Ages
European Land Mammal Ages
The European Land Mammal Mega Zones are zones in rock layers that have a specific assemblage of fossils based on occurrences of fossil assemblages of European land mammals. These biozones cover most of the Neogene and Paleogene systems The European Land Mammal Mega Zones (abbreviation: ELMMZ,...
. It follows the Orleanian
Orleanian
The Orleanian age is a period of geologic time , within the Miocene and used more specifically with European Land Mammal Ages. It precedes the Astaracian age and follows the Agenian age....
age and overlaps 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....
and Burdigalian
Burdigalian
The Burdigalian is, in the geologic timescale, an age or stage in the early Miocene. It spans the time between 20.43 ± 0.05 Ma and 15.97 ± 0.05 Ma...
ages.