Where: Carter County, Montana (45.1° N, 104.5° W: paleocoordinates 44.6° N, 64.4° W)
• coordinate stated in text
• outcrop-level geographic resolution
When: Metoicoceras mosbyense ammonoid zone, Belle Fourche Formation, Late/Upper Cenomanian (99.6 - 93.5 Ma)
• 18.3 m (60 ft) beneath highest yellow concretion
• bed-level stratigraphic resolution
Environment/lithology: marine; lithified shale
Size class: macrofossils
Collected by M.N. Bramlette, W.W. Rubey in 1924; reposited in the USNM
Primary reference: W. J. Kennedy and W. A. Cobban. 1990. Cenomanian micromorphic ammonites from the western interior of the USA. Palaeontology 33:379-422 [M. Clapham/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 175372: authorized by Matthew Clapham, entered by Matthew Clapham on 11.12.2015
Creative Commons license: CC BY (attribution)
Taxonomic list
| Cephalopoda | |
Metoicoceras cf. mosbyense, Nannometoicoceras nanos n. sp., Neocardioceras sp., Neocardioceras minutum
Metoicoceras cf. mosbyense Cobban 1953 ammonite
Nannometoicoceras nanos n. sp. Kennedy and Cobban 1990 ammonite
Neocardioceras sp. Spath 1926 ammonite
Neocardioceras minutum Cobban 1988 ammonite | |
|
Moremanoceras costatum Cobban et al. 1989 ammonite | |