473f. Finch farm, bend in road 1/8th mile east of E. A. Martin house. (Cambrian of the United States)

Where: Washington County, New York (42.6° N, 73.4° W: paleocoordinates 32.9° S, 74.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Lower Member (Whitehall Formation), Sunwaptan (493.5 - 487.5 Ma)

• "Lower Whitehall Fm., (Trempealeau)->Franconian?, Saukia-Serotina subzone"

•

•Saukiella serotina subzone: 490.4 - 490.0 Ma, very top of Sunwaptan

• member-level stratigraphic resolution

Environment/lithology: shallow subtidal; ooidal grainstone

• "stromatolitic, oolitic, etc. ls. Nearshore subtidal, (very shallow subtidal) ocean facing shelf (of unknown width) BA1-2."
• "The lower part of the Whitehall contains domal sltromatolites, thrombolites, and lime grainstones interpreted to have formed in supratidal, intertidal, and shallow-subtidal marine environments. The vagile epibenthic fauna probably occupied warm-water, nearshore, shallow-subtidal habitats characterized by sustained moderate to high turbulence. Some limestone beds contain length-slow chalcedony which is thought to be an indicator of general hypersalinity or widely fluctuating salinity conditions in the environment of deposition. "

•

•"Sample composed of medium gray (N 4-6) ooid grainstone and boundstone"

Collected by E.O Ulrich, R. Ruedeman & J. Bridge in 7/8/1931; reposited in the USNM

Primary reference: M. E. Taylor and R. B. Halley. 1974. Systematics, environment, and biogeography of some Late Cambrian and Early Ordovician trilobites from eastern New York State. United States Geological Survey Professional Paper 834:1-38 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 85186: authorized by Pete Wagner, entered by Pete Wagner on 05.12.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• Originally from Sepkoski 1998 (ref. #13)
Show authors, comments, and common names
Trilobita
 Asaphida - Ptychaspididae
Euptychaspis typicalis
 Asaphida - Dikelocephalidae
"Prosaukia" cf. spinula
"Prosaukia" cf. spinula Taylor and Halley 1974 trilobite
 Ptychopariida - Plethopeltidae
"Plethometopus obtusus" = Plethopeltis, "Plethometopus "sp. A"" = Plethopeltis
"Plethometopus obtusus" = Plethopeltis trilobite
"Plethometopus "sp. A"" = Plethopeltis Raymond 1913 trilobite