Isle La Motte, Chazy Group (Ordovician of the United States)

Where: Vermont (44.9° N, 73.3° W: paleocoordinates 28.0° S, 54.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Chazy Group, Chazy (466.0 - 457.5 Ma)

• "Valcour and or Crown Point Formation", in Flower (1955)

• formation-level stratigraphic resolution

Environment/lithology: marine; lithified limestone

Size classes: macrofossils, mesofossils

Primary reference: R. H. Flower. 1955. New Chazyan orthocones. Journal of Paleontology 29(5):806-830 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 171816: authorized by Björn Kröger, entered by Björn Kröger on 21.07.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

 Strophomenida - Rafinesquinidae
"Rafinesquina champlainensis" = Macrocoelia champlainensis3
"Rafinesquina champlainensis" = Macrocoelia champlainensis3 Raymond 1902
 Orthida - Orthidae
"Hebertella exfoliata" = Orthambonites exfoliata2
"Hebertella exfoliata" = Orthambonites exfoliata2 Raymond 1905
 Lingulida - Obolidae
"Lingula columba" = Lingulella columba2
"Lingula columba" = Lingulella columba2 Raymond 1905
 Orthocerida - Proteoceratidae
Proteoceras perkinsi Ruedemann 1906
 Actinocerida - Gonioceratidae
Gonioceras chaziense1 Ruedemann 1906