Stratton's Farm (Ordovician of the United States)

Where: Delta County, Michigan (45.7° N, 87.0° W: paleocoordinates 19.5° S, 55.4° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Amorphognathus ordovicicus conodont zone, Bay de Noc Member (Stonington Formation), Richmondian (449.6 - 445.5 Ma)

• Richmond Formation, Stonington beds, Bay de Noc "member" of beds.

• group of beds-level stratigraphic resolution

Environment/lithology: gray, argillaceous limestone

• Environmental call by T. Hanson. Paper suggests mouth of a river.
• Argillaceous limestone, massive-bedded, coarsely crystalline and hard. The color is dark gray on fresh surfaces, weathering to grayish-brown. At the southern end of the outcrop, the limestone changes to an alternation of thinly-bedded shale and argillaceous limestone.

Size classes: macrofossils, microfossils

Collection methods: chemical,

Primary reference: R. C. Hussey. 1926. The Richmond Formation of Michigan. In E. S. McCartney (ed.), Michigan University Contributions from the Museum of Geology 2:113-188 [S. Holland/T. Hanson/S. Bruning]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 26311: authorized by Steven Holland, entered by Tori Hanson on 11.10.2002, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Strophomenata
 Strophomenida - Rafinesquinidae
Rafinesquina varicosa
Rafinesquina varicosa
R. alternata varicosa and R. alternata noquettensis
Bivalvia
 Nuculanida - Nuculanidae
Clidophorus noquettensis
Clidophorus noquettensis pointed nut clam
 Nuculanida - Cucullellidae
"Clidophorus neglectus" = Nuculites neglectus
"Clidophorus neglectus" = Nuculites neglectus Hall 1862 clam
Ostracoda
 Hollinocopida - Tetradellidae
Tetradella regularis
Trilobita
 Asaphida - Asaphidae
? Isotelus gigas
? Isotelus gigas Dekay 1824 trilobite