Witten Limestone, Maxwell, Camarocladia beds (Ordovician of the United States)

Where: Tazewell County, Virginia (37.1° N, 81.6° W: paleocoordinates 29.6° S, 61.8° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Witten Limestone Formation, Caradoc (458.4 - 449.5 Ma)

• Blackriveran, Camarocladia beds

• formation-level stratigraphic resolution

Environment/lithology: fine-grained, gray limestone and coarse-grained limestone

• Even-bedded, dense, fine-grained limestones; golden gray prevails, but locally dark dove grays, hyacinth grays, and light beige grays predominate. Weathered surcfaces are considerably lighter than the fresh rock. The thickness varies from 45 to 75 feet and averages about 60 feet. Thin ribbon beds of coarse-grained limestone form minor intercalations.

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 34328: authorized by Steven Holland, entered by Tori Hanson on 26.08.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

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