Ste. Genevieve Limestone (overview) (Carboniferous of the United States)

Where: Washington County, Virginia (36.8° N, 82.3° W: paleocoordinates 19.9° S, 30.6° W)

• coordinate stated in text

• local area-level geographic resolution

When: Ste. Genevieve Limestone Formation, Meramecian (345.0 - 336.0 Ma)

• "Precise correlation of rocks in VA with those of the Ste. Genevieve at its type locality is questionable." The unit is mapped between the oldest and youngest occurrence of the Ste. Genevieve guide fossil Platycrinus penicillus (which also happens not to be in the Sepkoski Compendium).

On Geolex page, Ste. Genevieve Limestone of VA was assigned as member of the Greenbrier Fm. by Nolde, 1994. The Greenbrier is assigned to the Meramecian - Chesterian age. thus I decided that the Ste. Genevieve Limestone here is probably Late Meramec (= Holkerian - Asbian).

• formation-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, shelly/skeletal, gray, argillaceous, cherty/siliceous limestone and siltstone

• consists mainly of gray, argillaceous, shaly-weathering, medium bedded limestone. cherty limestone is common in the lower 200' of the section. beds of coarse grained crinoidal limestone are abundant particularly in the lower half of the section. argillaceous, calcareous siltstone and very fine grained sandstone occur in 2-3 thin units in various parts of the sequence.

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 7016: authorized by John Alroy, entered by Mike Sommers on 20.04.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Anthozoa
 Stauriida - Pentaphyllidae
 Stauriida - Hapsiphyllidae
 Auloporida - Syringoporidae
? Syringopora sp. Goldfuss 1826 tabulate coral
Cephalopoda
 Nautiloidea -
Nautiloidea indet. Agassiz 1847 nautiloid
a nautiloid
Strophomenata
 Strophomenida - Chonetidae
 Productida - Productidae
Rhynchonellata
 Spiriferinida - Reticulariinidae
Reticulariina sp. Fredericks 1916
 Terebratulida - Cranaenidae
Stenolaemata
 Cryptostomata - Acanthocladiidae
 Cryptostomata - Fenestellidae
 Cystoporida - Hexagonellidae
Crinoidea
 Monobathrida - Platycrinitidae
"Platycrinus penicillus" = Platycrinites
"Platycrinus penicillus" = Platycrinites Sea lily
 Dendrocrinida - Catacrinidae
Delocrinus sp. Miller and Gurley 1890 Sea lily
Blastoidea
  -
Blastoidea indet. Say 1825 blastoid
a blastoid