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
  -
Brachiopoda indet. Cuvier 1805
Bryozoa
  -
Bryozoa indet. Ehrenberg 1831
ramose
Cyclocystoidea
  - Cyclocystoididae
Sievertsia sp. Smith and Paul 1982
Blastoidea
 Fissiculata - Phaenoschismatidae
Echinoidea
  -
Echinoidea indet. Leske 1778 sea urchin
Crinoidea
 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"