MPM 3956, Marmarth (Cretaceous of the United States)

Where: Slope County, North Dakota (46.3° N, 103.9° W: paleocoordinates 52.7° N, 76.7° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Hell Creek Formation, Maastrichtian (72.1 - 66.0 Ma)

• within upper third of the 70-90 m thick outcrops of Hell Creek Fm.

• bed-level stratigraphic resolution

Environment/lithology: channel lag; tabular sandstone and fine-grained, concretionary, ferruginous siltstone

• "a point bar lithofacies"
• "thick (> 6 meters), cross-stratified sandstones contacted above and below by fine-grained siltstones with abundant ironstone concretions." (matrix on specimen is sandstone)

Size class: macrofossils

Collected in 1987

Collection methods: surface (float), mechanical,

Primary reference: M. B. Goodwin and R. E. Johnson. 1995. A new skull of the pachycephalosaur Stygimoloch casts doubt on head butting behavior. Journal of Vertebrate Paleontology 15(3, suppl.):32A [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 48843: authorized by Matthew Carrano, entered by Matthew Carrano on 31.03.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

 Neornithischia - Pachycephalosauridae
"Stygimoloch spinifer" = Pachycephalosaurus wyomingensis
"Stygimoloch spinifer" = Pachycephalosaurus wyomingensis Gilmore 1931 ornithischian
MPM 8111