Cliffield Formation, Five Oaks Limestone Member, North Tazewell (Ordovician of the United States)

Where: Tazewell County, Virginia (37.1° N, 81.5° W: paleocoordinates 29.6° S, 61.7° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Five Oaks Limestone Member (Cliffield Formation), Caradoc (458.4 - 449.5 Ma)

• Whiterockian

• member-level stratigraphic resolution

Environment/lithology: gray limestone

• fresh surfaces are characteristically dove gray, but weathered surfaces are generally white or light gray; limestones contain euhedral rhombs of calcite 0.5 to 8 mm in diameter, which are enclosed by exceedinly fine calcite grains; the beds break with a furrowed conchoidal fracture similar to that of many so-called lithographic limestones; also known as a calcilutyte.

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 33450: authorized by Steven Holland, entered by Tori Hanson on 30.07.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Tetradium
  -
Tetradium syringoporoides
Gastropoda
 Murchisoniina - Trochonematidae
? Trochonema sp.
? Trochonema sp. Salter 1859 snail
 Murchisoniina - Lophospiridae
Lophospira spp.
Lophospira spp. Whitfield 1886 snail
 Murchisoniina - Hormotomidae
Hormotoma sp.
Hormotoma sp. Salter 1859 snail
Ostracoda
 Leperditicopida - Leperditiidae
Leperditia fabulites
Leperditia fabulites ostracod
(Conrad)
Trilobita
 Phacopida - Pterygometopidae
Calliops sp.
Calliops sp. Delo 1935 trilobite
 Asaphida - Asaphidae
"Homotelus sp." = Isotelus
"Homotelus sp." = Isotelus Dekay 1824 trilobite