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North American faunal stage
The
Hemingfordian
on the
geologic timescale
is the North American
faunal stage
according to the
North American Land Mammal Ages
chronology (NALMA), typically set from 20,600,000 to 16,300,000 years
BP
.
[1]
It is usually considered to overlap the latest
Aquitanian
and
Burdigalian
of the
Early Miocene
. The Hemingfordian is preceded by the
Arikareean
and followed by the
Barstovian
NALMA stages.
The Hemingfordian can be further divided into the substages of:
- Late/Upper Hemingfordian: Lower boundary source: base of
Burdigalian
(approximate).
- Early/Lower Hemingfordian (shares lower boundary)
References
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edit
]