Benbolt Formation, Shannondale Member, Thompson Valley (Ordovician of the United States)

Where: Tazewell County, Virginia (37.0° N, 81.6° W: paleocoordinates 29.6° S, 61.9° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Shannondale Limestone Member (Benbolt Formation), Caradoc (458.4 - 449.5 Ma)

• Ashbyan

• member-level stratigraphic resolution

Environment/lithology: gray, cherty/siliceous limestone

• medium-bedded, coarse-grained, dark bluish-gray, sparsely cherty limestones

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 33936: authorized by Steven Holland, entered by Tori Hanson on 08.08.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Demospongiae
 Lithistida - Streptosolenidae
Eospongia roemeri
Eospongia roemeri Billings 1861 demosponge
Billings
Stenolaemata
 Trepostomida -
Nicholsonella sp.
Nicholsonella sp. Ulrich 1890
Rhynchonellata
 Orthida - Plectorthidae
Mimella melonica
Mimella melonica
(Willard)
 Orthida - Glyptorthidae
Glyptorthis bellarugosa
Glyptorthis bellarugosa Conrad 1843
(Conrad)
 Pentamerida - Camerellidae
Camerella varians
Camerella varians Billings 1859
Billings [entered as Camarella varians]
 Rhynchonellida - Trigonirhynchiidae
""Camarotoechia" cf. pristina" = Rostricellula pristina
""Camarotoechia" cf. pristina" = Rostricellula pristina Raymond 1905
Raymond
 Rhynchonellida - Camarotoechiidae
Camarotoechia quadriplicata
 Rhynchonellida - Sphenotretidae
"Zygospira cf. acutirostris" = Sphenotreta acutirostris
"Zygospira cf. acutirostris" = Sphenotreta acutirostris Hall 1847
(Hall)
Strophomenata
 Strophomenida - Sowerbyellidae
Ptychoglyptus sp.
Ptychoglyptus sp. Willard 1928
 Strophomenida - Strophomenidae
"Strophomena tennesseensis" = Rhipidomena tennesseensis
"Strophomena tennesseensis" = Rhipidomena tennesseensis Willard 1928
Willard
 Strophomenida - Furcitellidae
Oepikina "minnesotensis"
Oepikina "minnesotensis" Winchell 1881
(Winchell)
Gastropoda
 Euomphalina - Macluritidae
Maclurites magnus
Maclurites magnus Le Sueur 1818 snail
Lesueur