Bigby-Cannon (Lower Bigby) - Wilson, 1949 (Ordovician of the United States)

Where: Tennessee (35.5° N, 86.5° W: paleocoordinates 28.1° S, 66.4° W)

• local area-level geographic resolution

When: Plectodina tenuis conodont zone, Bigby Member (Bigby-Cannon Limestone Formation), Shermanian (457.3 - 449.6 Ma)

• Lower Bigby

• group of beds-level stratigraphic resolution

Environment/lithology: sand shoal; shelly/skeletal grainstone

• Geologic information from field notes of S.M. Holland and M.E. Patzkowsky
• thin to medium bedded skeletal grainstone, phosphatic, prominently cross-bedded.

Size class: macrofossils

Preservation: original calcite, replaced with calcite

Primary reference: C. W. Wilson. 1949. Pre-Chattanooga stratigraphy in Central Tennessee. Tennessee Division of Geology Bulletin 56:1-415 [S. Holland/S. Holland]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 5355: authorized by Steven Holland, entered by Steven Holland on 27.09.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Stenolaemata
 Trepostomata - Halloporidae
Hallopora pulchella, Hallopora angularis
 Trepostomida - Monticuliporidae
Prasopora simulatrix
Rhynchonellata
 Orthida - Dalmanellidae
Dalmanella fertilis
Dalmanella fertilis Ulrich 1909
 Orthida - Plectorthidae
Hebertella frankfortensis
Cephalopoda
 Actinocerida - Actinoceratidae
Actinoceras capitolinum