Pentamerid community, Cordell Fm. (Silurian of the United States)

Where: Chippewa County, Michigan (46.2° N, 84.8° W: paleocoordinates 19.4° S, 50.2° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Cycle VI zone, Cordell Formation, Llandovery (443.4 - 433.4 Ma)

• "Lower Sil. C6" Community is also represented in the Lime Island and Schoolcraft Fms.

Environment/lithology: offshore shelf; cherty/siliceous dolomite

• "thin bedded (but sometimes massive) dolomite, locally abundant gray to white chert nodules. open, calm- below wave base; or shallow protected. cratonic"

Size class: macrofossils

Primary reference: M. E. Johnson and G. T. Campbell. 1980. Recurrent carbonate environments in the lower Silurian of northern Michigan and their interregional correlation. Journal of Paleontology 54:1041-1057 [M. Uhen/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 539: authorized by Arnold Miller, entered by Mike Sommers on 12.01.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Johnson and Campbell, 1980"
Show authors, comments, and common names
Rhynchonellata
 Pentamerida - Pentameridae
Pentameroides sp.
Pentameroides sp. Schuchert and Cooper 1931
 Rhynchonellida - Machaerariidae
Ferganella sp.
Ferganella sp. Nikiforova 1937
 Rhynchonellida - Rhynchonellidae
Rhynchonellidae indet.
Rhynchonellidae indet. Gray 1848
rhynconellid - originally entered as "Rhynchonellida indet."
Trilobita
 Corynexochida - Styginidae
Scutellum sp.
Scutellum sp. Pusch 1833 trilobite
Anthozoa
 Rugosa -
Rugosa indet.
Rugosa indet. horn coral
 Favositida - Favositidae
Favosites sp.
Favosites sp. Lamarck 1816 tabulate coral