Big Black River (Byram Formatrion, Unit F) (Oligocene of the United States)

Also known as MGS locality 106

Where: Hinds County, Mississippi (32.3° N, 90.6° W: paleocoordinates 32.8° N, 83.3° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Byram Formation, Orellan (33.9 - 33.3 Ma)

• said to be Orellan

Environment/lithology: offshore; silty claystone

• "nearshore marine shelf environment" and "shallow offshore bars seaward of a bay environment."

Size class: macrofossils

Collected by David and Mary Dockery, Luc and Therese Dolin, and Edward Lollar in 1985

Collection methods: bulk,

Primary reference: E. Manning, D. T. Dockery, and J. A. Schiebout. 1986. Preliminary report of a Metamynodon skull from the Byram Formation (Lower Oligocene) in Mississippi. Mississippi Geology 6(2):1-19 [J. Alroy/J. Alroy/J. Marcot]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 17071: authorized by John Alroy, entered by John Alroy on 19.05.2000, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• correlated with nannoplankton zone NP22
Mammalia
 Perissodactyla - Amynodontidae
Metamynodon planifrons Scott and Osborn 1887 odd-toed ungulate
Bivalvia
 Ostreida - Gryphaeidae
"Pycnodonta paroxis" = Pycnodonte
"Pycnodonta paroxis" = Pycnodonte oyster
Anthozoa
 Scleractinia - Oculinidae
"Archohelia vicksburgensis" = Petrophyllia
"Archohelia vicksburgensis" = Petrophyllia stony coral