Also known as Was: Champlain Valley, Fort Ann Fm., early Arenig, New York

Where: New York (43.9° N, 73.4° W: paleocoordinates 31.5° S, 67.2° W)

• coordinate based on nearby landmark

When: Macerodus dianae conodont zone, Fort Ann Formation, Stairsian (485.4 - 478.6 Ma)

• Given as Demingian in Mazzullo & Friedman, but Jeffersonian on all later charts (PJW3).

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•Landing & Westrop (2006 J. Paleo 80:960) give this as Macerodus dianae conodont zone & Paraplethopeltis seelyi faunal zone.

Environment/lithology: peritidal; limestone

Size classes: macrofossils, mesofossils

Primary reference: S. J. Mazzullo and G. M. Friedman. 1977. Competitive algal colonization of peritidal flats in a schizohaline environment; the lower Ordovician of New York. Journal of Sedimentary Petrology 47(1):398-410 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 289: authorized by Jack Sepkoski, entered by Mike Sommers on 20.11.1998, edited by Pete Wagner

Creative Commons license: CC BY (attribution)