Witten Limestone, County Roads 631 and 632 (laminated limestone) (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

• formation-level stratigraphic resolution

Environment/lithology: gray, argillaceous limestone

• light-gray platy-weathering straticulate calcilutytes; argillaceous; most bedding surfaces are mud-cracked, and locally desiccation fractures have developed columnar jointing.

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 34268: authorized by Steven Holland, entered by Tori Hanson on 25.08.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

 Phacopida - Pterygometopidae
"Calliops callicephalus" = Calyptaulax callicephala
"Calliops callicephalus" = Calyptaulax callicephala Hall 1847 trilobite
 Leperditicopida - Leperditiidae
"Isochilina armata" = Leperditia (Isochilina)
"Isochilina armata" = Leperditia (Isochilina) ostracod
 Murchisoniina - Eotomariidae
Liospira sp. Ulrich and Scofield 1897 snail
Tetradium fibratum
  - Florideophyceae
"Tetradium fibratum" = Prismostylus fibratum
"Tetradium fibratum" = Prismostylus fibratum Safford 1856