Witten Limestone, State Highway 16 (Cryptophragmus beds) (Ordovician of the United States)

Where: Tazewell County, Virginia (37.0° N, 81.0° W: paleocoordinates 30.0° S, 61.5° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Witten Limestone Formation, Caradocian (460.9 - 449.5 Ma)

• Blackriveran, Cryptophragmus beds

• formation-level stratigraphic resolution

Environment/lithology: coarse-grained limestone

• 10 to 25 feet thick (18 feet thick average) ribbon-bedded coarse-grained coquina limestone.

Size classes: macrofossils, microfossils

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 34279: authorized by Steven Holland, entered by Tori Hanson on 25.08.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Tetradium
  -
Stromatoporoidea
 Labechiida - Aulaceratidae
Cryptophragmus antiquatus Raymond 1914 stromatoporoid sponge
Raymond
Cephalopoda
 Orthocerida - Orthoceratidae
Gastropoda
 Murchisoniina - Loxonematidae
Omospira cf. laticincta Ulrich and Scofield 1897 snail
Ulrich
 Murchisoniina - Trochonematidae
"Trochonema umbilicatum" = Trochonema umbilicata
"Trochonema umbilicatum" = Trochonema umbilicata Hall 1847 snail
(Hall)
 Euomphalina - Helicotomidae
Helicotoma cf. granosa Ulrich and Scofield 1897 snail
Ulrich
 Euomphalina - Macluritidae
"Maclurites bigsbyi" = Maclurina bigsbyi
"Maclurites bigsbyi" = Maclurina bigsbyi Hall 1861 snail
(Hall)
Strophomenata
 Strophomenida - Sowerbyellidae
Sowerbyella cf. lebanonensis Bassler 1932
Bassler
 Strophomenida - Strophomenidae
Strophomena incurvata Shephard 1838
(Shepard)
Rhynchonellata
 Orthida - Hesperorthidae
Hesperorthis cf. tricenaria Conrad 1843
(Conrad)
 Orthida - Plectorthidae
Doleroides sp. Cooper 1930
 Orthida - Draboviidae
"Pionodema miniscula" = Pionodema minuscula
"Pionodema miniscula" = Pionodema minuscula Willard 1928
Willard
 Atrypida - Anazygidae
"Zygospira recurvirostris" = Anazyga recurvirostra
"Zygospira recurvirostris" = Anazyga recurvirostra Hall 1847
(Hall)
Stenolaemata
 Cryptostomata - Rhinidictyidae
Phyllodictya frondosa, "Rhinidictya nicholsoni" = Stictopora nicholsoni
Phyllodictya frondosa Ulrich 1882
Ulrich
"Rhinidictya nicholsoni" = Stictopora nicholsoni Ulrich 1882
Ulrich
 Cryptostomata - Escharoporidae
Graptodictya sp. Ulrich 1882
Escharopora sp. Hall 1847
 Trepostomida - Monticuliporidae
Orbignyella sp. Ulrich and Bassler 1904
Ostracoda
 Leperditicopida - Isochilinidae
Isochilina armata ostracod
(Walcott)
 Palaeocopida - Leperditellidae
Leperditella sulcata ostracod
(Ulrich)
 Podocopida - Bairdiidae
Krausella arcuata ostracod
Ulrich
Trilobita
 Corynexochida - Illaenidae
Illaenus sp. Dalman 1827 trilobite
 Phacopida - Pterygometopidae
Calyptaulax confluens trilobite
(Foerste)