The Paleobiology Database

ammonites

North American Mammal Subages/Zones: Arikareean - Rancholabrean

Interval	Maximum correlate

Sheridanian	Rancholabrean


Cudahyan	Irvingtonian


Sappan	Irvingtonian


"Senecan"	Blancan


Rexroadian	Blancan


Late/Upper Hemphillian	Hemphillian


late Early Hemphillian	Hemphillian


early Early Hemphillian	Hemphillian


Late/Upper Clarendonian	Clarendonian


Early/Lower Clarendonian	Clarendonian


late Late Barstovian	Barstovian


early Late Barstovian	Barstovian


Early/Lower Barstovian	Barstovian


Late/Upper Hemingfordian	Hemingfordian


Early/Lower Hemingfordian	Hemingfordian


late Late Arikareean	Arikareean


early Late Arikareean	Arikareean


late Early Arikareean	Arikareean


early Early Arikareean	Arikareean

Authorizer: J. Alroy Enterer: J. Alroy

Continent: North America Rank of each interval: subage/stage

Basis of scale: paleontological

Reference: M. O. Woodburne 1987

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