Where: Arkansas (35.7° N, 91.8° W: paleocoordinates 13.8° S, 34.9° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Goniatites granosus ammonoid zone, Fayetteville Formation, Brigantian (336.0 - 330.9 Ma)

• Fayetteville shale, 2-ft bed at top of Batesville Sandstone

• group of beds-level stratigraphic resolution

Environment/lithology: lithified limestone

Size class: macrofossils

Collected by G.H. Girty in 1907; reposited in the USNM

Primary reference: M. Gordon. 1964. Carboniferous Cephalopods of Arkansas. United States Geological Survey Professional Paper 460:1-322 [J. Alroy/C. Simpson/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 160511: authorized by Matthew Clapham, entered by Matthew Clapham on 23.08.2014

Creative Commons license: CC BY (attribution)