USGS-M6649 (Cretaceous of the United States)
Where: Alaska (59.8° N, 160.5° W: paleocoordinates 63.6° N, 95.7° W)
When: Eek Mountain Formation, Valanginian (140.2 - 136.4 Ma)
Environment/lithology: sandstone and carbonate
• lithology described as greywacke with thin calcareous interbeds
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 2429: authorized by Mark Patzkowsky, entered by Karen Layou on 05.07.1999