Chazy village, NY, Strephochetus bed, C6: Chazyan, New York

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda - Oncocerida - Valcouroceratidae
Cameroceras tenuiseptum (Ruedemann 1906)
recombined as Valcouroceras tenuiseptum
Cephalopoda - Oncocerida - Oncoceratidae
Oncoceras pristinum Ruedemann 1906
Cephalopoda - Orthocerida - Proteoceratidae
Cyrtactinoceras boycii (Whitfield 1886)
Loxoceras moniliforme (Hall 1847)
recombined as Proteoceras moniliforme
Cephalopoda - Orthocerida - Orthoceratidae
Orthoceras modestum Ruedemann 1906
see common names

Geography
Country:United States State/province:New York
Coordinates: 44.9° North, 73.4° West (view map)
Paleocoordinates:27.9° South, 54.7° West
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period:Ordovician
10 m.y. bin:Ordovician 2-4
Key time interval:Chazyan
Age range of interval:470.00000 - 457.00000 m.y. ago
Stratigraphy
Geological group:Chazy Formation:Valcour
Stratigraphic resolution:formation
Stratigraphy comments: "Group C" of the Chazy Formation (Upper Chazy).
Lithology and environment
Primary lithology: lithified "limestone"
Lithology description: Details of the divisions at each of the localities from which each specimen listed are not given, thus I will give a complete description of lithologies summarized by Ruedemann for the formation at two different localities. “Section of the Chazy beds at Valcour in ascending order: The Chazy beds at Valcour form a low anticline. B1, a hard, compact, gray limestone, exposed at water edge, on land of Ezra Day. 2 feet of its top exposed. B2, same rock. 6 inches. B3, gray, shaly impure limestone with mud seams; very fossiliferous. 1 foot 4 inches. B4, more crystalline limestone with darker shaly intercalations. 1 foot 10 inches. Contains numerous small bryozoan reefs and other fossils; also many cephalopods in its upper layer (just north of fence diving lands of George and Ezra Day). B5, darker, impure shaly limestone. 1 foot 6 inches. Contains some large nautiloids. B6, a gray shaly limestone, 3 feet, containing a rich fauna (Bolboporites, Malocystites, brachipods, trilobites). B7, series of heavier, dark gray beds with abundant plates of Palaocystites. 7a-10 inches, barren; 7b-14 inches, in lower 3 inches full of trilobites; 7c-3 feet 6 inches, barren; 7c2-8 inches, hard crystalline gray limestone with trilobites. B8, 5 ½ feet of dark shaly limestone, nearly bluish gray and very fossiliferous, containing orthoceracones. Since we can do no better than base our future stratigraphic work on the larger lithologic divisions recognized by Brainerd and Seely in the Beekmantown formation at East shore ham Vt. And in the Chazy formation at Chazy village, we refer the fossils obtained at other places than the Valcour shore provisionally to those divisions.”
Environment:reef, buildup or bioherm
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection excludes:some genera
Reason for describing collection:taxonomic analysis
Metadata
Database number:42810
Authorizer:P. Wagner Enterer:K. Koverman
Modifier:B. Kröger Research group:marine invertebrate
Created:2004-08-05 13:38:18 Last modified:2024-03-31 19:20:59
Access level:the public Released:2004-08-05 13:38:18
Creative Commons license:CC BY
Reference information

Primary reference:
11371.1% R. Ruedemann. 1906. Cephalopoda of the Beekmantown and Chazy formations of the Champlain Basin. Bulletin of the New York State Museum, Paleontology 14:389-611 [P. Wagner/K. Koverman/M. Uhen]