Pennington formation (overview) (Carboniferous of the United States)

Where: Washington County, Virginia (36.8° N, 82.3° W: paleocoordinates 16.2° S, 26.7° W)

• coordinate stated in text

• local area-level geographic resolution

When: Pennington Formation, Chesterian (335.5 - 323.2 Ma)

• formation-level stratigraphic resolution

Environment/lithology: offshore; lithified, argillaceous, silty, sandy, calcareous siltstone and sandstone

• complexly interbedded shale, sandstone, siltstone, and sandy or argillaceous limestone. shale is silty, micaceous, slightly calcareous and fissile. shales grade into siltstones that are generally calcareous, fossiliferous, and thin to thick bedded. sandstone beds are mostly very fine-grained, brown, argillaceous, and fossiliferous. basal channeling is present at a few outcrops. limestones are a minor component of the fm. they are very argillaceous, silty or sandy, and grade mainly into calcareous siltstones.

Primary reference: C. S., J.r. Bartlett and H. W. Webb. 1971. Geology of the Bristol and Wallace quadrangles, Virginia. Virginia Division of Mineral Resources Report of Investigations 25:1-93 [J. Alroy/M. Sommers/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 7035: authorized by John Alroy, entered by Mike Sommers on 20.04.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Nautiloidea -
Nautiloidea indet.
Nautiloidea indet. Agassiz 1847 nautiloid
fragments
Bivalvia
 Solemyida - Solemyidae
Solemya sp.
Solemya sp. Children 1823 Awning Clam
 Ostreida - Posidoniidae
"Posidonomya sp." = Posidonia
"Posidonomya sp." = Posidonia Bronn 1828 oyster
 Pectinida - Aviculopectinidae
Aviculopecten sp.
Aviculopecten sp. M'Coy 1851 scallop
 Pholadomyida - Edmondiidae
Allorisma sp.
Allorisma sp. King 1844 clam
 Cardiidia - Grammysiidae
? Grammysia sp.
? Grammysia sp. de Verneuil 1847 clam
Rhynchonellata
 Spiriferinida - Punctospiriferidae
Punctospirifer sp.
Punctospirifer sp. North 1920
 Spiriferida - Spiriferidae
Anthracospirifer cf. leidyi
Anthracospirifer cf. leidyi Norwood and Pratten 1855
 Terebratulida - Dielasmatidae
Dielasma cf. arkansanum
Strophomenata
 Productida - Echinoconchidae
"Diaphragmus aff. elegans" = Echinoconchus elegans
"Diaphragmus aff. elegans" = Echinoconchus elegans Norwood and Pratten 1855
 Productida - Monticuliferidae
Ovatia cf. ovata
 Productida - Productidae
Dictyoclostus parvus, Dictyoclostus scitulus, Dictyoclostus burlingtonensis
Dictyoclostus scitulus Meek and Worthen 1860
 Orthotetida - Orthotetidae
Orthotetes sp.
 Strophomenida - Chonetidae
Chonetes cf. chesterensis
Stenolaemata
 Cryptostomata - Fenestellidae
Fenestrellina serratula, Fenestrellina tenax, Archimedes sp.
 Cryptostomata - Acanthocladiidae
Polypora sp.
 Trepostomida - Stenoporidae
Tabulipora tuberculata
Crinoidea
 Monobathrida - Platycrinitidae
"Platycrinus penicillus" = Platycrinites
"Platycrinus penicillus" = Platycrinites Sea lily
Blastoidea
 Spiraculata - Pentremitidae
Pentremites sp.
Pentremites sp. Say 1820 blastoid