Osagean

Osagean

[ō′sā·jē·ən]
(geology)
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.