Eggleston Formation, north of Benbolt (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: Eggleston Formation, Trentonian (457.3 - 449.6 Ma)

• formation-level stratigraphic resolution

Environment/lithology: gray, calcareous mudstone and argillaceous limestone

• 30 to 115 feet of dark-gray calcareous mudrock, medium-gray argillaceous limestone, dark-brown siltstone, wavy bands of rusty-brown fossiliferous chert, apricot-buff metabentonite, and greenish-gray cuneiform-jointed siliceous mudrock. The cuneiform-jointed beds invariably overlie or underlie the metabentonites.

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 34341: authorized by Steven Holland, entered by Tori Hanson on 27.08.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Strophomenata
 Strophomenida - Sowerbyellidae
"Sowerbyella "sericea"" = Sowerbyella (Sowerbyella) sericea, Sowerbyella curdsvillensis
"Sowerbyella "sericea"" = Sowerbyella (Sowerbyella) sericea Sowerby 1839
 Strophomenida - Rafinesquinidae
Rafinesquina "alternata"
Rhynchonellata
 Orthida - Dalmanellidae
"Dalmanella rogata" = Paucicrura rogata
"Dalmanella rogata" = Paucicrura rogata Sardeson 1892
Stenolaemata
 Cryptostomata - Escharoporidae
Escharopora subrecta
Escharopora subrecta Ulrich 1886
(Ulrich)
 Trepostomata - Halloporidae
Hallopora multitabulata
Hallopora multitabulata Ulrich 1886
(Ulrich)
Ostracoda
 Palaeocopida - Leperditellidae
Leperditella sulcata
Leperditella sulcata ostracod
(Ulrich)
 Hollinocopida - Eurychilinidae
Eurychilina subradiata
Eurychilina subradiata ostracod
Ulrich
 Leperditicopida - Isochilinidae
Isochilina sp.
Isochilina sp. Jones 1858 ostracod