Osagean | Article about Osagean by The Free Dictionary
A provincial series of geologic time in North America; Lower Mississippian (above Kinderhookian, below Meramecian).
References in periodicals archive
Systematics and phylogeny of the Late Osagean and Meramecian crinoids Platycrinites and Eucladocrinus from the Mississippian stratotype region.
Stratigraphy and condont biostratigraphy of Kinderhookian and Osagean (lower Mississippian) rocks of southwestern Missouri and adjacent areas.
The common thread that connects most of them is this: they are at or near the top of a thick pile of deltaic sediments, deposited in late Osagean
(Middle Mississippian) time.