The Clarendonian North American Stage on the
geologic timescale
The geologic time scale, or geological time scale, (GTS) is a representation of time based on the rock record of Earth. It is a system of chronological dating that uses chronostratigraphy (the process of relating strata to time) and geochr ...
is the North American
faunal stage according to the
North American Land Mammal Ages
The North American land mammal ages (NALMA) establishes a geologic timescale for North American fauna beginning during the Late Cretaceous and continuing through to the present. These periods are referred to as ages or intervals (or stages when ref ...
chronology (NALMA), typically set from 13,600,000 to 10,300,000 years
BP, a period of .
Paleobiology Database, Clarendonian
/ref>
It is usually considered to overlap the Serravallian
The Serravallian is, in the geologic timescale, an age or a stage in the middle Miocene Epoch/Series, which spans the time between 13.82 Ma and 11.63 Ma (million years ago). The Serravallian follows the Langhian and is followed by the Torto ...
age of the Middle Miocene
The Middle Miocene is a sub-epoch of the Miocene Epoch made up of two stages: the Langhian and Serravallian stages. The Middle Miocene is preceded by the Early Miocene.
The sub-epoch lasted from 15.97 ± 0.05 Ma to 11.608 ± 0.005 Ma (million ...
and the Tortonian age of the Late Miocene
The Late Miocene (also known as Upper Miocene) is a sub-epoch of the Miocene Epoch made up of two stages. The Tortonian and Messinian stages comprise the Late Miocene sub-epoch, which lasted from 11.63 Ma (million years ago) to 5.333 Ma.
The ...
. The Clarendonian is preceded by the Barstovian
The Barstovian North American Stage on the geologic timescale is the North American faunal stage according to the North American Land Mammal Ages chronology (NALMA), typically set from 16,300,000 to 13,600,000 years BP, a period of . It is u ...
and followed by the Hemphillian NALMA stages.
Subdivisions
The Clarendonian can be further divided into the substages of:
* Late/Upper Clarendonian: Lower boundary source of the base of the Clarendonian (approximate)
* Early/Lower Clarendonian (shares lower boundary)
References
Miocene life
Miocene animals of North America
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