Witten Limestone, State Highway 16, Camarocladia 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, 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 34324: authorized by Steven Holland, entered by Tori Hanson on 26.08.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Trilobita
 Corynexochida - Illaenidae
Illaenus sp. Dalman 1827 trilobite
 Phacopida - Pterygometopidae
Calyptaulax confluens trilobite
(Foerste)
Ostracoda
 Podocopida - Bairdiidae
Krausella arcuata ostracod
Ulrich
 Palaeocopida -
Leperditella sulcata ostracod
(Ulrich)
 Leperditicopida - Leperditiidae
"Isochilina armata" = Leperditia (Isochilina)
"Isochilina armata" = Leperditia (Isochilina) ostracod
(Walcott)
Gastropoda
 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)
 Murchisoniina - Trochonematidae
"Trochonema umbilicatum" = Trochonema umbilicata
"Trochonema umbilicatum" = Trochonema umbilicata Hall 1847 snail
(Hall)
 Murchisoniina - Loxonematidae
Omospira cf. laticincta Ulrich and Scofield 1897 snail
Ulrich
Cephalopoda
 Orthocerida - Orthoceratidae
Stenolaemata
 Cryptostomata - Ptilodictyonidae
Escharopora sp. Hall 1847
 Cryptostomata - Rhinidictyidae
Phyllodictya frondosa Ulrich 1882
Ulrich
 Cryptostomata - Escharoporidae
Graptodictya sp. Ulrich 1882
 Trepostomata - Monticuliporidae
Orbignyella sp. Ulrich and Bassler 1904
 Cryptostomida -
Rhinidictya nicholsoni Ulrich 1882
Ulrich
Strophomenata
 Strophomenida - Sowerbyellidae
Sowerbyella cf. lebanonensis Bassler 1932
Bassler
 Strophomenida - Strophomenidae
Strophomena incurvata Shephard 1838
(Shepard)
Rhynchonellata
 Atrypida - Anazygidae
"Zygospira recurvirostris" = Anazyga recurvirostra
"Zygospira recurvirostris" = Anazyga recurvirostra Hall 1847
(Hall)
 Orthida - Draboviidae
 Orthida - Hesperorthidae
Hesperorthis cf. tricenaria Conrad 1843
(Conrad)
 Orthida - Plectorthidae
Doleroides sp. Cooper 1930
Stromatoporoidea
 Labechiida - Aulaceratidae
Cryptophragmus antiquatus Raymond 1914
Raymond
Tetradium
  -