Where: Montana (45.4° N, 107.1° W: paleocoordinates 45.5° N, 66.6° W)

• coordinate estimated from map

When: Neogastroplites haasi ammonoid zone, Shell Creek Member (Thermopolis Formation), Early/Lower Cenomanian (99.6 - 93.5 Ma)

• member-level stratigraphic resolution

Environment/lithology: marine; limestone

Size class: macrofossils

Primary reference: I. Walaszczyk and W. A. Cobban. 2016. Inoceramid bivalves and biostratigraphy of the upper Albian and lower Cenomanian of the United States Western Interior Basin. Cretaceous Research 59:30-68 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 234734: authorized by Pete Wagner, entered by Pete Wagner on 09.05.2024

Creative Commons license: CC BY (attribution)