Where: Marion County, Arkansas (36.2° N, 92.7° W: paleocoordinates 23.8° S, 79.1° W)

• coordinate based on nearby landmark

When: Powell Formation, Floian (477.7 - 470.0 Ma)

Environment/lithology: marine; lithology not reported

Size class: macrofossils

Preservation: original aragonite, replaced with calcite

Primary reference: E. O. Ulrich, A. F. Foerste, A. K. Miller and W. M. Furnish. 1942. Ozarkian and Canadian cephalopods, Part I: Nautilicones. Geological Society of America Special Papers 37:1-157 [B. Kröger/B. Kröger/B. Kröger]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 99872: authorized by Björn Kröger, entered by Björn Kröger on 26.11.2010, edited by Pete Wagner

Creative Commons license: CC BY (attribution)