Where: Jefferson County, Montana (45.9° N, 111.6° W: paleocoordinates 14.2° S, 46.4° W)
• coordinate based on nearby landmark
• small collection-level geographic resolution
When: Three Forks Shale Formation, Famennian (372.2 - 358.9 Ma)
• 128 feet below Lodgepole Limestone, 28 feet below base of upper siltstone unit.
• group of beds-level stratigraphic resolution
Environment/lithology: offshore; lithified, ferruginous, brown, red siltstone and green shale
Primary reference: G. D. Robinson. 1963. Geology of the Three Forks Quadrangle, Montana. United States Geological Survey Professional Paper 370:1-143 [J. Alroy/M. Sommers/J. Ju]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 7249: authorized by John Alroy, entered by Mike Sommers on 19.05.2000
Creative Commons license: CC BY (attribution)
Taxonomic list
Rhynchonellata | |
"Nudirostra cf. dunbarense" = Leiorhynchus
"Nudirostra cf. dunbarense" = Leiorhynchus | |
"Schizophoria cf. australis" = Schizophoria (Schizophoria) australis
"Schizophoria cf. australis" = Schizophoria (Schizophoria) australis Kindle 1909 | |
Strophomenata | |
Schuchertella sp. Girty 1904 |