Wardell Formation, Thompson Valley, Stromatocerium beds (Ordovician of the United States)

Where: Tazewell County, Virginia (37.1° N, 81.5° W: paleocoordinates 29.6° S, 61.8° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Wardell Formation, Caradoc (458.4 - 449.5 Ma)

• Blackriveran, Stromatocerium rugosum beds

• formation-level stratigraphic resolution

Environment/lithology: coarse-grained, gray, argillaceous limestone

• light- to medium-gray coarse0grained clastic limestones; some are pinkish and cross-laminated; the darker beds are argillaceous and disintegrate into a rubble of shell fragments.

Size class: macrofossils

Primary reference: B. N. Cooper and C. E. Prouty. 1943. Stratigraphy of the Lower Middle Ordovician of Tazewell County, Virginia. Bulletin of the Geological Society of America 54:819-886 [S. Holland/T. Hanson/T. Hanson]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 34224: authorized by Steven Holland, entered by Tori Hanson on 22.08.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Chlorophyceae
  - Receptaculitidae
Receptaculites sp.
Receptaculites sp. Defrance 1827
Rhodophyceae
  - Solenoporaceae
Solenopora compacta
Anthozoa
 Lichenariida - Lichenariidae
Lichenaria carterensis
Lichenaria carterensis tabulate coral
(Safford)
 Stauriida - Columnariidae
Columnaria halli
Columnaria halli horn coral
Nicholson
Demospongiae
 Sigmatosclerophorida - Dystactospongiidae
Dystactospongia sp.
Dystactospongia sp. Miller 1882 demosponge
Stromatoporoidea
 Labechiida - Stromatoceriidae
Stromatocerium rugosum
Stromatocerium rugosum Hall 1847 stromatoporoid sponge
(Hall)
Crinoidea
 Porocrinida -
Carabocrinus sp.
Carabocrinus sp. Billings 1857 Sea lily
 Diplobathrida - Cleiocrinidae
Cleiocrinus cf. tessellatus
Cleiocrinus cf. tessellatus Sea lily
(Troost)
 Diplobathrida - Rhodocrinitidae
Diabolocrinus sp.
Diabolocrinus sp. Wachsmuth and Springer 1897 Sea lily
 Rhombifera - Cheirocrinidae
"Cheirocrinus ? angulatus" = Coronocystis angulatus
"Cheirocrinus ? angulatus" = Coronocystis angulatus Wood 1909
Wood
Stenolaemata
 Cryptostomata - Rhinidictyidae
Pachydictya robusta
Pachydictya robusta Ulrich 1882
Ulrich
 Trepostomata - Trematoporidae
Batostoma cf. sevieri
Hormogoneae
 Oscillatoriales - Girvanellaceae
Girvanella sp.
Girvanella sp. Nicholson and Etheridge 1878