South of Marjum Pass (Cambrian of the United States)
Where: Utah (39.5° N, 113.8° W: paleocoordinates 3.9° S, 91.4° W)
• small collection-level geographic resolution
When: Upper Member (Marjum Formation), Marjumian (504.5 - 497.0 Ma)
• group of beds-level stratigraphic resolution
Environment/lithology: lithified, cherty/siliceous limestone
• Gray, more or less thin-bedded limestone that weathers to a dark lead-gray color and breaks down into angular fragments one-half to 2 inches thick. Flattened cherty nodules and thin, irregular cherty layers occur at intervals
Size classes: macrofossils, mesofossils
Reposited in the USNM
Primary reference: C. W. Walcott. 1908. Cambrian Brachiopoda: descriptions of new genera and species. Smithsonian Miscellaneous Collections 53(3):53-137 [P. Wagner/P. Wagner]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 232932: authorized by Pete Wagner, entered by Pete Wagner on 08.01.2024
Creative Commons license: CC BY (attribution)
Taxonomic list
Show authors, comments, and common names
| Lingulata | |
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Acrotreta marjumensis Walcott 1908
Acrotreta cf. sagittalis Salter 1865
Acrotreta bellatula Walcott 1908 | |
|
"Obolus (Fordinia) perfectus" = Fordinia perfecta Walcott 1908
Obolus (Fordinia) gilberti n. sp. Walcott 1908 | |
| Artiopoda | |
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