ammonites
banner
Gateway to the Paleobiology Database
East Chatham Quad, unnamed fm., NY (Cambrian of the United States)

Where: Columbia County, New York (42.4° N, 73.5° W: paleocoordinates 34.1° S, 88.0° W)

• coordinate based on nearby landmark

• basin-level geographic resolution

When: Bonnia - Olenellus zone, Lenian (516.0 - 513.0 Ma)

Environment/lithology: offshore shelf; green limestone and shale

• "sh and ls; ls beds up to 15 cm thick, fine grained; green shale. ? Shelf BA4?"

Primary reference: J. J. Sepkoski Jr. 1998. Rates of speciation in the fossil record. Philosophical Transaction of the Royal Society Biological Sciences 353(1366):315-326 [J. Sepkoski/M. Sommers/A. Clement] more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 189: authorized by Jack Sepkoski, entered by Mike Sommers on 20.11.1998