Wardell Formation, south of Wardell, Receptaculites beds (Ordovician of the United States)

Where: Tazewell County, Virginia (37.0° N, 81.8° W: paleocoordinates 29.5° S, 62.0° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Wardell Formation, Caradocian (460.9 - 449.5 Ma)

• Blackriveran, Receptaculites biconstrictus beds

• formation-level stratigraphic resolution

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

• drab-gray fine-grained argillaceous limestones which weather nodular and bright buff, wavy seams of buff-weathering shale surround lenticular nodules of fairly pure, fine-grained limestone; the weathered limestone nodules form a loose rubble and, because of this nodular character, the contacts with overlying and undelying beds are sharp.

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 34248: authorized by Steven Holland, entered by Tori Hanson on 22.08.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Girvanella
  -
Girvanella sp. Nicholson and Etheridge 1878
Trilobita
 Corynexochida - Illaenidae
"Illaenus conradi" = Thaleops conradi
"Illaenus conradi" = Thaleops conradi Billings 1859 trilobite
Billings
 Phacopida - Pterygometopidae
"Calliops cf. callicephalus" = Calyptaulax callicephala
"Calliops cf. callicephalus" = Calyptaulax callicephala Hall 1847 trilobite
(Hall)
Ostracoda
 Leperditicopida - Leperditiidae
"Isochilina armata" = Leperditia (Isochilina)
"Isochilina armata" = Leperditia (Isochilina) ostracod
(Walcott)
Stenolaemata
 Trepostomida -
 Cryptostomata - Ptilodictyonidae
Escharopora ? subrecta Ulrich 1886
(Ulrich)
 Cryptostomata - Rhinidictyidae
Pachydictya sp. Ulrich 1882
 Cryptostomata - Escharoporidae
Graptodictya sp. Ulrich 1882
 Trepostomata - Dittoporidae
Hemiphragma sp. Ulrich 1893
 Cystoporata - Ceramoporidae
Scenellopora radiata Ulrich 1882
Ulrich
Rhombifera
 Caryocystitida - Caryocystitidae
Crinoidea
 Cyathocrinida -
Carabocrinus sp. Billings 1857 Sea lily
Strophomenata
 Strophomenida - Strophomenidae
Strophomena ? incurvata Shephard 1838
(Shepard)
Strophomena emaciata Winchell and Schuchert 1892
Winchell and Schuchert
Rhynchonellata
 Rhynchonellida - Trigonorhynchiidae
"Camarotoechia ? plena" = Rostricellula plena, "Camarotoechia ? plena" = Rostricellula plena
"Camarotoechia ? plena" = Rostricellula plena Hall 1847
(Hall) [entered as Camarotoechis plena]
"Camarotoechia ? plena" = Rostricellula plena Hall 1847
(Hall)
 Orthida - Draboviidae
? Pionodema subaequata Conrad 1843
subsp. circularis (Winchell)
 Orthida - Glyptorthidae
Glyptorthis sp. Foerste 1914
 Orthida - Plaesiomyidae
 Orthida - Plectorthidae
Mimella globosa Willard 1928
(Willard)
Chlorophyceae
  - Receptaculitidae