Where: Montana (47.5° N, 112.7° W: paleocoordinates 39.9° N, 51.8° W)
• coordinate stated in text
• small collection-level geographic resolution
When: Middle Shale Member (Sawtooth Formation), Bajocian to Bajocian (170.3 - 166.1 Ma)
• middle shale member of Sawtooth formation; the Middle Shale member is probably of Bajocian to Bathonian age
• group of beds-level stratigraphic resolution
Environment/lithology: marine; lithified shale
Size class: macrofossils
Reposited in the USGS
• collection was made by R. W. Imlay in 1958
Primary reference: R. W. Imlay. 1962. Jurassic (Bathonian or Early Callovian) Ammonites from Alaska and Montana. Geological Survey Professional Paper 374-C:1-32 [M. Aberhan/S. Nurnberg]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 68838: authorized by Martin Aberhan, entered by Sabine Nürnberg on 10.02.2007
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Camptonectes stygius White 1874 scallop | |
"Pleuromya subcompressa" = Myacites (Pleuromya) subcompressa
"Pleuromya subcompressa" = Myacites (Pleuromya) subcompressa Meek 1873 clam |