Also known as M-11

Where: Independence County, Arkansas (35.8° N, 91.6° W: paleocoordinates 13.3° S, 34.0° W)

• coordinate based on nearby landmark

When: Ruddle Shale Member (Moorefield Formation), Chesterian (335.5 - 323.2 Ma)

• "Goniatites granosus-Dombarites choctawensis Group of late Visean (early Chesterian) age" (i.e., Asbian or Brigantian)

•"section is more than 30 m thick. The sampled horizon that yielded the gastropod and conodont fauna is about 1 m thick... about 2 m above the base of the section"

• bed-level stratigraphic resolution

Environment/lithology: offshore shelf; black shale

Size classes: macrofossils, mesofossils

Preservation: replaced with limonite

Collection methods: bulk, chemical, sieve,

• "A bulk sample of about 60 kg... was processed using the methods described by Mapes & Mapes (1982) [i.e., (1) dried and treated with solvent; (2) solvent removed and water added; (3) washed and sieved; (4) repeat 1 to 3]... after disaggregation, a 60-mesh sieve was used to concentrate [the residue]"

Primary reference: A. Nützel and R. H. Mapes. 2001. Larval and juvenile gastropods from a Carboniferous black shale: palaeoecology and implications for the evolution of the Gastropoda. Lethaia 34(2):143-162 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 73201: authorized by John Alroy, entered by John Alroy on 06.06.2007, edited by Barbara Seuss and Pete Wagner

Creative Commons license: CC BY (attribution)