Where: Jefferson County, Montana (45.9° N, 111.7° W: paleocoordinates 14.9° S, 46.5° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Trident Member (Three Forks Formation), Middle Famennian (370.6 - 364.7 Ma)
• bed-level stratigraphic resolution
Environment/lithology: marine; lithified shale
Size class: macrofossils
Preservation: replaced with limonite
Reposited in the MfN
Primary reference: D. Korn and A. Titus. 2006. The ammonoids from the Three Forks Shale (Late Devonian) of Montana. Fossil Record 9(2):198-212 [D. Korn/D. Korn]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 189674: authorized by Matthew Clapham, entered by Matthew Clapham on 04.11.2017
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Pernoceras crebriseptum Raymond 1909 ammonite | |
Raymondiceras simplex Raymond 1909 ammonite |