PB420 (Ordovician of the United States)

Where: New York (44.6° N, 73.4° W: paleocoordinates 28.8° S, 56.4° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Valcour Formation (Chazy Group), Whiterockian (470.0 - 457.3 Ma)

Environment/lithology: lithified, massive, silty limestone and lithified, calcareous shale

• "Thin beds of silty limestone alternating with 3-4" beds of calcareous shale."

Size classes: macrofossils, mesofossils

Preservation: replaced with silica

Reposited in the NYSM

Collection methods: chemical,

Primary reference: F.C. Shaw. 1968. Early Middle Ordovician (Chazy) trilobites of New York. New York State Museum and Science Service Memoir 17:1-163 [P. Wagner/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 103010: authorized by Melanie Hopkins, entered by Melanie Hopkins on 21.01.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Odontopleurida - Odontopleuridae
Apianurus narrawayi Raymond 1910 trilobite
 Phacopida - Cheiruridae
"Heliomeroides akocephala" = Heliomeroides teres
"Heliomeroides akocephala" = Heliomeroides teres Evitt 1951 trilobite
 Trinucleida - Raphiophoridae
Lonchodomas halli Billings 1861 trilobite
 Asaphida - Remopleurididae
Remopleurides canadensis Billings 1865 trilobite