NationMaster - Encyclopedia: Chattian

The Chattian (also known as Chickasawhayan) is the second and final of two stages of the Oligocene Epoch. It spans the time between 28.4 ± 0.1 Ma and 23.03 ± 0.05 Ma (million years ago). Faunal stages are a subdivision of geologic time used primarily by paleontologists who study fossils rather than by geologists who study rock formations. ... The Oligocene epoch is a geologic period of time that extends from about 34 million to 23 million years before the present. ... The word epoch can mean either an interval of time, or a particular point in time used as a reference point. ... Mega-annum, usually abbreviated as Ma, is a unit of time equal to one million years. ...

References

GeoWhen Database - Chattian

Tertiary sub-era

Chattian

Categories: ‪Geology stubs‬ | ‪Oligocene‬ The Tertiary period was previously one of the major divisions of the geologic timescale, from the end of the Cretaceous period about 65. ... Paleogene (alternatively Palaeogene) period is a unit of geologic time that began 65 and ended 23 million years ago. ... The Paleocene epoch (65-56 MYA) (early dawn of the recent) is the first geologic epoch of the Palaeogene period in the modern Cenozoic era. ... The Eocene epoch (56-34 MYA) is a major division of the geologic timescale and the second epoch of the Palaeogene period in the Cenozoic era. ... The Oligocene epoch is a geologic period of time that extends from about 34 million to 23 million years before the present. ... The Lutetian is a stage of the middle Eocene Epoch. ... In the geologic timescale, the Bartonian is the age of the Eocene epoch of the Paleogene period of the Cenozoic era of the Fanerozoic eon that is comprehended between 40 million 400 thousand and 37 million 200 thousand years ago, approximatedly. ...