Tormosocrinus-Kyphosocrinus Assoc., Wolcott Limestone (Grainstone Facies) (Silurian of the United States)

Where: New York (43.2° N, 76.8° W: paleocoordinates 24.8° S, 46.4° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Wolcott Limestone Formation (Clinton Group), Llandovery (443.4 - 433.4 Ma)

• "Late Llandoverian (C4-C5?), Wolcott Limestone (only). Wolcott Formation, lower 2 m.

• member-level stratigraphic resolution

Environment/lithology: deep subtidal; gray, green, silty shale and shelly/skeletal, gray grainstone

• "[Grainstones] constitute a high energy shoal...The [shales] are gradiational...and represent a closely related but low energy deposit, probably on the outer fringes of the echinoderm shoal. This environment supported prolific thickes of bryozoans...Preservation exceptionally good...Close association with pentamerid grainstone suggests outer BA 3...shales contain abundant undescribed large stricklandiid...indicating BA 4."

•

•2003:04:06- Environmental call by SEP based on lithologic and stratigrahpic context outlined in original reference. Formation name not in wide usage.

• "...assemblage associated with greenish-gray silty shales containing a few thin calcisiltites. The fenestrate bryozoan-rich shales occur in an interbedded interval about 0.5 m thick within the lower 2 m...They are under- and overlain gradationally by crinoidal brachiopod-rich packstones and grainstones having very abundant shells of Pentamerus oblongus."

Size class: macrofossils

Collection methods: Abundances for echinoderms given in table 45.33.

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 26773: authorized by Michael Foote, entered by Michael Foote on 31.10.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Atalacrinus arctus, Aclistocrinus capistratus, Kyphosocrinus tetreaulti, Scapanocrinus muricatus
Bryozoa
  -
Bryozoa indet.
Bryozoa indet. Ehrenberg 1831
Rhynchonellata
 Pentamerida - Pentameridae
Pentamerus oblongus
Pentamerus oblongus de Sowerby 1839
Trilobita
  -
Trilobita indet.
Trilobita indet. Walch 1771 trilobite
unclassified
  -
Asterozoa indet.
Crinoidea
 Disparida - Tornatilicrinidae
Haptocrinus sp.
Haptocrinus sp. Eckert and Brett 2001 Sea lily
 Myelodactylida - Myelodactylidae
Myelodactylus linae
 Flexibilia -
Flexibilia indet.
 Dendrocrinida - Dendrocrinidae
Dendrocrinus aphelos, Dendrocrinus bactronodosus
 Cyathocrinida - Euspirocrinidae
Euspirocrinus wolcottense
 Diplobathrida - Callistocrinidae
Callistocrinus tesselatus
Callistocrinus tesselatus Eckert and Brett 2001 Sea lily
 Diplobathrida - Emperocrinidae
Tormosocrinus furberi
Tormosocrinus furberi Eckert and Brett 2001 Sea lily