Layer 21 (Ordovician of the United States)

Where: New York (43.3° N, 75.1° W: paleocoordinates 28.9° S, 57.9° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Spillway Member (Rust Formation), Middle Ordovician (470.0 - 458.4 Ma)

Environment/lithology: marine; lithified, tabular, fine-grained lime mudstone

• tabular, fine grained lime mudstone (micrite or calcilutite)

Size class: macrofossils

Collected by Thomas E. Whiteley in 1990-1999; reposited in the MCZ

Collection methods: surface (in situ), mechanical,

Primary reference: C. E. Brett, T. E. Whiteley, P. A. Allison and E. L. Yochelson. 1999. The Walcott-Rust Quarry: Middle Ordovician Trilobite Konservat-Lagerst├Ątten. Journal of Paleontology 73(2):288-305 [M. Hopkins/M. Hopkins/M. Hopkins]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 181532: authorized by Melanie Hopkins, entered by Melanie Hopkins on 15.09.2016

Creative Commons license: CC BY (attribution)

Taxonomic list

 Phacopida - Cheiruridae
"Ceraurus pleuxanthemus" = Ceraurus pleurexanthemus
"Ceraurus pleuxanthemus" = Ceraurus pleurexanthemus Green 1832 trilobite