Eohalysiocrinus-Decaschisma Assoc., Birdsong Shale, Vulcan Materials Quarry (Devonian of the United States)

Where: Tennessee (35.9° N, 88.1° W: paleocoordinates 36.1° S, 49.0° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Birdsong Shale Formation, Lochkovian (419.2 - 410.8 Ma)

• "Lower Devonian (Gedinnian)...Upper portion of Birdsong Shale"

• formation-level stratigraphic resolution

Environment/lithology: offshore; gray, calcareous shale and shelly/skeletal, argillaceous limestone

• Material generally well preserved; similar to bryozoan thickets of Rochester Shale, Keyser Limestone etc.; rapid deposition in low-energy environment inferred; BA 4.

•SEP environmental call based on given info

• "...about 5 m of interbedded, thin (1 cm), bryozoan-rich limestone, alternating with gray, calcareous, fossiliferous shale...The limestones are dominantly muddy wackestones and packstones."

Primary reference: T. J. Frest, C. E. Brett, and B. J. Witzke. 1999. Caradocian-Gedinnian echinoderm associations of Central and Eastern North America. Paleocommunities--a case study from the Silurian and Lower Devonian 638-783 [M. Foote/K. Koverman/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 26786: authorized by Michael Foote, entered by Michael Foote on 31.10.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• Fauna is said to include 21 speceis of crinoids in 18 genera, but not all of these are listed. Brachiopods are also omitted.
Brachiopoda indet. Cuvier 1805
Bryozoa indet. Ehrenberg 1831
  - Cyclocystoididae
Sievertsia sp. Smith and Paul 1982
 Fissiculata - Phaenoschismatidae
Echinoidea indet. Leske 1778 sea urchin
 Myelodactylida - Myelodactylidae
Myelodactylidae indet. Miller 1883 Sea lily
 Inadunata -
Theloreus sp. Moore 1962 Sea lily
 Calceocrinida - Calceocrinidae
Eohalysiocrinus "n. sp. 1" Prokop 1970 Sea lily
"two new species of Eohalysiocrinus"
Eohalysiocrinus "n. sp. 2" Prokop 1970 Sea lily
"two new species of Eohalysiocrinus"
 Sagenocrinida -
 Cladida -
Thalamocrinus spp. Miller and Gurley 1895 Sea lily
"two species"
 Camerata -
Camerata indet. Wachsmuth and Springer 1885 Sea lily
 Camerata - Melocrinidae
 Monobathrida -
Stiptocrinus sp. Kirk 1946 Sea lily
 Diplobathrida - Dimerocrinitidae
Dimerocrinites spp. Phillips 1839 Sea lily
"two species"