Fauna of Bucks Quarry, New York, Chaumont Formation (Ordovician of the United States)

Where: Herkimer County, New York (43.2° N, 75.1° W: paleocoordinates 29.0° S, 57.9° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Chaumont Formation (Black River Group), Middle Ordovician (470.0 - 458.4 Ma)

• Fossil trilobites correlate with the Platteville fauna; therefore, maximum stage is probably Blackriveran.

• formation-level stratigraphic resolution

Environment/lithology: black limestone

• Environmental call by T. Hanson
• "Black, dense, fine-grained crystalline to sublithographic limestone, with scattered sugary seams and patches of medium-grained black calcite, fracturing hackly, weathering light-gray."

Size class: macrofossils

Primary reference: L. L. DeMott. 1987. Platteville and Decorah Trilobites from Illinois and Wisconsin. Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35 [S. Holland/T. Hanson/S. Holland]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 23122: authorized by Steven Holland, entered by Tori Hanson on 09.07.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Buthograptus laxus
Trilobita
 Proetida - Bathyuridae
"Raymondites longispinus" = Bathyurus (Raymondites) longispinus
"Raymondites longispinus" = Bathyurus (Raymondites) longispinus Walcott 1876 trilobite
 Corynexochida - Illaenidae
Thaleops ovata, Bumastoides milleri
Thaleops ovata Conrad 1843 trilobite
Bumastoides milleri Billings 1859 trilobite
 Asaphida - Asaphidae
"Basiliella barrandi" = Basilicus (Basiliella), Isotelus simplex
"Basiliella barrandi" = Basilicus (Basiliella) trilobite
Isotelus simplex Raymond and Narraway 1910 trilobite
Gastropoda
 Bellerophontida - Pterothecidae
Pterotheca expansa
Pterotheca expansa Emmons 1842 snail