Wardell Formation, western Tazewell County (buff shale zone) (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

• local area-level geographic resolution

When: Wardell Formation, Caradocian (460.9 - 449.5 Ma)

• Blackriveran

• formation-level stratigraphic resolution

Environment/lithology: gray, calcareous shale and gray sandstone

• 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. In median belts of the western part of the county, steel-gray, buff-weathering sandstones occur near the top.

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 34259: authorized by Steven Holland, entered by Tori Hanson on 25.08.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

  - 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