Bigby-Cannon (Upper 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)

• Upper Bigby, but Includes some Cannon facies

• member-level stratigraphic resolution

Environment/lithology: sand shoal; lithified, shelly/skeletal, gray grainstone and wackestone

• Geological information from field notes of S.M. Holland and M.E. Patzkowsky
• mostly skeletal grainstone, phosphatic, cross-bedded. includes some cannon facies: medium to thin-bedded, dark gray, skeletal to peloidal wackestone and packstone, interbedded with dark gray mudstones.

Size classes: macrofossils, mesofossils

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 5357: authorized by Steven Holland, entered by Steven Holland on 27.09.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Murchisoniina - Lophospiridae
"Lophospira saffordi" = Paupospira oweni
"Lophospira saffordi" = Paupospira oweni Ulrich and Scofield 1897 snail
Rhynchonellata
 Rhynchonellida - Rhynchotrematidae
 Atrypida - Anazygidae
"Zygospira recurvirostris" = Anazyga recurvirostra
"Zygospira recurvirostris" = Anazyga recurvirostra Hall 1847
 Orthida - Platystrophiidae
 Orthida - Plectorthidae
Strophomenata
 Strophomenida - Rafinesquinidae
Stenolaemata
 Trepostomata - Aisenvergiidae
 Trepostomata - Heterotrypidae
 Trepostomata - Halloporidae
 Cystoporata - Constellariidae
 Trepostomida - Atactotoechidae
 Trepostomida - Monticuliporidae
 Cryptostomata - Rhinidictyidae
 Cryptostomata - Escharoporidae
Anthozoa
 Stauriida - Columnariidae
Columnaria alveolata Goldfuss 1826 horn coral
Stromatoporoidea
 Labechiida - Stromatoceriidae
Stromatocerium pustulosum stromatoporoid sponge
Demospongiae
 Streptosclerophorida - Hindiidae
Hindia parva demosponge