Porterfield Quarry, 5 miles northeast of Saltville (Ordovician of the United States)

Where: Smyth County, Virginia (36.9° N, 81.7° W: paleocoordinates 30.3° S, 66.5° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Hustedograptus teretiusculus graptolite zone, Arline Formation, Darriwilian (467.3 - 458.4 Ma)

• this interval falls within the lower part of the Pygodus anserinus Zone and the upper part of the Pygodus serrus Zone.

•

•... which occur above the Maclurites beds of the Lenoir and interfinger with black shale of the Rich Valley formation.

• formation-level stratigraphic resolution

Environment/lithology: limestone

• .. the characteristic fossils of the Arline formation occur in cobbly and shaly limestone 225 feet thick...

Size class: macrofossils

Reposited in the USNM

Primary reference: G. A. Cooper. 1956. Chazyan and related brachiopods. Smithsonian Miscellaneous Collections 127:1-1245 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 162406: authorized by Pete Wagner, entered by Pete Wagner on 24.09.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Rhynchonellata
 Orthida - Plaesiomyidae
Valcourea semicarinata n. sp.
Valcourea semicarinata n. sp. Cooper 1956
Strophomenata
 Strophomenida - Sowerbyellidae
Sowerbyella silicica n. sp.
Sowerbyella silicica n. sp. Cooper 1956
includes Sowerbyella silicica nana Cooper
 Strophomenida - Leptellinidae
Leptellina transversa n. sp., Palaeostrophomena subtransversa n. sp.
Leptellina transversa n. sp. Cooper 1956
Palaeostrophomena subtransversa n. sp. Cooper 1956
 Strophomenida - Strophomenidae
Opikina matutina n. sp.
Opikina matutina n. sp. Cooper 1956
 Strophomenida - Furcitellidae
Dactylogonia geniculata
Dactylogonia geniculata Ulrich and Cooper 1942