Where: Montana (48.0° N, 106.3° W: paleocoordinates 54.6° N, 79.1° W)
• coordinate stated in text
• outcrop-level geographic resolution
When: Baculites grandis ammonoid zone, Bearpaw Formation, Early/Lower Maastrichtian (70.6 - 66.0 Ma)
• Unit 6, upper part. PJW: This is very top of formation, which is Baculites grandis zone.
• group of beds-level stratigraphic resolution
Environment/lithology: offshore; poorly lithified, concretionary shale
Size class: macrofossils
Reposited in the USNM
Primary reference: F. S. Jensen and H. D. Varnes. 1964. Geology of the Fort Peck area, Garfield, McCone and Valley counties, Montana. United States Geological Survey Professional Paper 414-F:1-49 [M. Clapham/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 213092: authorized by Matthew Clapham, entered by Matthew Clapham on 25.08.2020
Creative Commons license: CC BY (attribution)
Taxonomic list
Scaphopoda | |
Dentalium pauperculum tusk shell | |
Cephalopoda | |
Discoscaphites sp. Meek 1870 ammonite | |
Baculites grandis Hall and Meek 1855 ammonite |