ammonites
banner
Gateway to the Paleobiology Database
Acoite Fm., Los Colorados and Quebrada Chamarra, Argentina (Ordovician of Argentina)

Where: Argentina (24.0° S, 66.0° W: paleocoordinates 42.2° S, 130.0° W)

• local area-level geographic resolution

When: Acoite Formation, Arenig (478.6 - 466.0 Ma)

• They report this as Middle Arenig, probably corresponding with the Whitlandian

• formation-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; lithified, concretionary, gray, green, sandy sandstone and shale

• green-gray fine-grained shaley sandstone intercalated with dark gray and yellowish gray shale and sandy shale and sandy limolites and occasional cone-in-cone concretions

Collection methods: JA: marked by Novack-Gottshall without explanation as omitting some genera, some macrofossils, some microfossils, and species names, but apparently complete

Primary reference: T. M. Sanchez and B.G. Waisfeld. 1995. Benthic assemblages in the northwestern of Gondwana: A test of the Ordovician evolutionary radiation model. In J.D. Cooper, M.L. Droser, S.C. Finney (eds.), Ordovician Odyssey: Short papers for the seventh international symposium on the Ordovician system 409-412 [A. Miller/P. Novack-Gottshall/P. Wagner] more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 8777: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 29.08.2000

Creative Commons license: CC BY (attribution)