Wardell Formation, northwest side of Thompson Valley (buff shale zone) (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: Wardell Formation, Caradocian (460.9 - 449.5 Ma)

• Blackriveran

• formation-level stratigraphic resolution

Environment/lithology: gray, calcareous shale

• Calcareous, platy, mealy shales averaging 40 feet thick. Their characteristic buff color is developed by weathering, but, where fresh, the shales are light bluish gray.

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 34263: authorized by Steven Holland, entered by Tori Hanson on 25.08.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Stenolaemata
  - Phylloporinidae
Chasmatopora sp. Eichwald 1860
 Cryptostomata - Ptilodictyonidae
Escharopora sp. Hall 1847
 Cryptostomata - Escharoporidae
Graptodictya sp. Ulrich 1882
 Trepostomata - Amplexoporidae
Monotrypa sp. Nicholson 1879
 Trepostomata - Trematoporidae
Eridotrypa sp. Ulrich 1893
 Cystoporata - Ceramoporidae
Scenellopora sp. Ulrich 1882