Also known as Mesler, 1903

Where: Washington County, Arkansas (36.1° N, 94.2° W: paleocoordinates 8.1° S, 31.4° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Brentwood Member (Bloyd Shale Formation), Morrowan (323.2 - 318.6 Ma)

• The Bloyd Shale includes the Brentwood limestone member at the base, named as a subdivision of the Morrow formation by Adams (1904, p. 28) and Ulrich (1904, p. 109). This is overlain by the Woolsey member, a succession of terrestrial sedimentary rocks, mostly shale and including the Baldwin coal bed. The upper 1/2 to 2/3 of the formation consits largely of black shale consisting an unnamed marine shalemember with a calcareous conglomeratic sandstone at the base at a number of localities and including the Kessler limestone lentil at the top.

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, sandy, conglomeratic, calcareous limestone and lithified, black shale

Size class: macrofossils

Reposited in the USGS

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 43348: authorized by John Alroy, entered by Carl Simpson on 12.08.2004

Creative Commons license: CC BY (attribution)