Where: Montana (47.6° N, 112.7° W: paleocoordinates 39.7° N, 51.4° W)
• coordinate stated in text
• small collection-level geographic resolution
When: Lower Sandstone Member (Sawtooth Formation), Bajocian (170.3 - 168.3 Ma)
• from lower sandstone member of Sawtooth formation; the Lower Sandstone member is probably of Bajocian age
• group of beds-level stratigraphic resolution
Environment/lithology: marine; lithified sandstone
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 68828: authorized by Martin Aberhan, entered by Sabine Nürnberg on 09.02.2007
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Trigonia cf. conradi clam | |
Ostrea sp. Linnaeus 1758 oyster | |
Meleagrinella curta Hall 1852 scallop | |
Camptonectes stygius White 1874 scallop | |
Echinoidea | |
|