Where: Big Horn County, Montana (45.4° N, 108.2° W: paleocoordinates 44.6° N, 66.0° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Himes Member (Cloverly Formation), Middle Albian to Middle Albian (109.0 - 93.5 Ma)

• upper part of member, Ostrom's Unit VII; 16 ft above Unit VI

•

•D'Emic et al. 2019: New data reported in this study suggest that deposition of the Cloverly Formation spanned the Valanginian–Cenomanian stages (ca. 140 Ma–98 Ma), a longer time interval than the commonly cited Aptian–Albian depositional timeframe. In the mid–late Albian to early Cenomanian (ca. 109–98 Ma), sediment sourced from the east was deposited as the Himes Member and Greybull Sandstone.

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; claystone

Size class: macrofossils

Collected by J. Ostrom in 1964; reposited in the YPM

Collection methods: quarrying, mechanical,

Primary reference: J. H. Ostrom. 1970. Stratigraphy and paleontology of the Cloverly Formation (Lower Cretaceous) of the Bighorn Basin area, Wyoming and Montana. Peabody Museum Bulletin 35:1-234 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 50479: authorized by Matthew Carrano, entered by Matthew Carrano on 16.05.2005

Creative Commons license: CC BY (attribution)