Oregonia Member, Formation

Geology

Group: Richmondian

Formation: Arnheim

Members: unnamed (35)

Lithologies: mudstone (35), packstone (35)

Paleoenvironments: marine indet. (1), open shallow subtidal (35)

Age range: Richmondian or 449.60000 to 445.50000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Late/Upper Ordovician458.4 - 443.8USA (Kentucky) (75167)
Richmondian449.6 - 445.5USA (Indiana) (72427 72428 72429 72469 72470 72471)
Richmondian449.6 - 445.5USA (Ohio) (72540 72812 72813 72845 72846 72847 72848 72849 72850 72851 72924 72925 72964 72965 72966 72967 73036 73037 73038 73039 73040 73120 73121 73125)
Richmondian449.6 - 445.5USA (Kentucky) (73115 73116 73117 73118 73119)