USGS-M6645 (Mt. Oratia) (Cretaceous of the United States)
Where: Alaska (60.0° N, 160.0° W: paleocoordinates 63.6° N, 94.9° W)
When: Mount Oratia Formation, Valanginian (140.2 - 136.4 Ma)
Environment/lithology: calcareous sandstone and conglomerate
• lithology also includes beds of impure limestone
Reposited in the USGS
Primary reference: J. M. Hoare and W. L. Coonrad. 1983. Greywacke of Buchia Ridge and Correlative Lower Cretaceous Rocks in the Goodnews Bay and Bethel Quadrangles, Southwestern Alaska. U.S. Geological Survey Bulletin 1529-C C1-C17 [M. Patzkowsky/K. Layou/A. Clement] more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 2426: authorized by Mark Patzkowsky, entered by Karen Layou on 05.07.1999