Where: Washington County, Arkansas (35.9° N, 94.0° W: paleocoordinates 8.8° S, 31.7° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Brentwood Member (Bloyd Formation), Morrowan (318.1 - 314.6 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified shale

Size class: macrofossils

Primary reference: J. K. Rigby and W. L. Manger. 1994. Morrowan lithistid demosponges and hexactinellids from the Ozark Mountains of northwestern Arkansas. Journal of Paleontology 68(4):734-746 [W. Kiessling/U. Merkel] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 111781: authorized by Wolfgang Kiessling, entered by Uta Merkel on 28.06.2011

Creative Commons license: CC BY (attribution)