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Irvingtonian
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Irvingtonian
The
Irvingtonian North American Land Mammal Age
on the
geologic timescale
is the North American
faunal stage
according to the
North American Land Mammal Ages
chronology (NALMA), typically set from 1,800,000 to 240,000 years
BP
, a period of . Named after an assemblage of fossils from the Irvington district of
Fremont, California
, the Irvingtonian is usually considered to overlap the
Lower Pleistocene
and
Middle Pleistocene
epochs. The Irvingtonian is preceded by the
Blancan
and followed by the
Rancholabrean
NALMA stages.
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