Where: Dixon County, Nebraska (42.5° N, 96.8° W: paleocoordinates 42.5° N, 60.6° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Carlile Shale Formation (Colorado Group), Late/Upper Turonian (93.5 - 89.3 Ma)
• STRATIGRAPHIC RELATIONS: From the Carlise Shale, which regionally overlies the Greenhorn Fm (Turonian), and is overlain by the Niobrara Fm. AGE: Middle-Late Turonian, on the basis of ammonite biostratigraphy. STRATIGRAPHIC POSITION: From unknown position within formation.
• bed-level stratigraphic resolution
Environment/lithology: marine; lithified shale
Size class: macrofossils
Preservation: cast, mold/impression, concretion
Reposited in the USNM
Collection methods: surface (in situ),
• COLLECTOR: Not stated in text. REPOSITORY: USNM.
Primary reference: W. A. Cobban. 1983. Molluscan fossil record from the northeastern part of the Upper Cretaceous seaway, Western Interior. United States Geological Survey Professional Paper 1253:1-25 [A. Hendy/A. Hendy/A. Hendy]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 88003: authorized by Austin Hendy, entered by Austin Hendy on 30.03.2009
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Scaphites patulus Cobban 1951 ammonite | |
"Subprionocyclus percarinatus" = Collignoniceras percarinatum
"Subprionocyclus percarinatus" = Collignoniceras percarinatum Hall and Meek 1856 ammonite | |
Bivalvia | |
Inoceramus cuvieri Sowerby 1814 clam
Inoceramus fragilis Hall and Meek 1856 clam |