Also known as Arkadelphia; USGS # 18880
Where: Clark County, Arkansas (34.1° N, 93.1° W: paleocoordinates 38.7° N, 70.1° W)
• outcrop-level geographic resolution
When: Arkadelphia marl Formation, Maastrichtian (72.1 - 66.0 Ma)
• Haustator bilira assemblage zone.
• formation-level stratigraphic resolution
Environment/lithology: marine; lithified, gray, sandy siltstone
Preservation: original aragonite, original calcite
Reposited in the USGS
• others collection
Primary reference: N. F. Sohl and C. F. Koch. 1984. Upper Cretaceous (Maestrichtian) larger invertebrate Fossils from the Haustator bilira Assemblage Zone in the west gulf Coastal Plain. USGS Open File Report 84-687:1-282 [M. Kosnik/M. Kosnik]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 4387: authorized by Matt Kosnik, entered by Matt Kosnik on 14.08.1999
Creative Commons license: CC BY (attribution)
Taxonomic list
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