Cliffield Formation Lincolnshire Limestone Member, Pounding Mill Branch (Ordovician of the United States)

Where: Tazewell County, Virginia (37.1° N, 81.7° W)

• Paleocoordinates: 19.8° S, 113.1° W (Wright 2013)

• coordinate estimated from map

• outcrop-level geographic resolution

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

• Ashbyan or Whiterockian

• member-level stratigraphic resolution

Environment/lithology: black, gray limestone

• Brownish-gray to black, medium-grained, irregularly bedded limestone averaging 60 feet thick. Nearly all beds contain nodules of dense black chert. Wavy bituminous clayey streaks mark the bedding and cause the beds to weather cobbly. Some layers near the base develop a "worm-eaten" appearance, as clayey stringers are dissolved.

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 33526: authorized by Steven Holland, entered by Tori Hanson on 01.08.2003

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Asaphida - Asaphidae
Homotelus cf. elongatus
Homotelus cf. elongatus Raymond 1920 trilobite
Raymond
Gastropoda
 Euomphalina - Macluritidae
Maclurites magnus
Maclurites magnus Le Sueur 1818 snail
Lesueur
Rhynchonellata
 Orthida - Plaesiomyidae
Dinorthis atavoides
Dinorthis atavoides Willard 1928
Willard
 Rhynchonellida - Trigonirhynchiidae
""Camarotoechia" pristina" = Rostricellula pristina
""Camarotoechia" pristina" = Rostricellula pristina Raymond 1905
Raymond
Strophomenata
 Strophomenida - Syndielasmatidae
Sowerbyites (Plectambonites) triseptatus
Stenolaemata
 Trepostomida - Amplexoporidae
Monotrypa sp.
Monotrypa sp. Nicholson 1879
 Trepostomida -
Nicholsonella sp.
Nicholsonella sp. Ulrich 1890
 Cryptostomata - Rhinidictyidae
Pachydictya robusta
Pachydictya robusta Ulrich 1882
Ulrich
 Cryptostomata - Arthrostylidae
Glauconome sp.
Glauconome sp. Goldfuss 1826
Demospongiae
 Lithistida - Streptosolenidae
Eospongia sp.
Eospongia sp. Billings 1861 demosponge