Tropic Shale (Cretaceous of the United States)

Where: Kane County, Utah (37.0° N, 112.5° W: paleocoordinates 38.7° N, 75.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Tropic Shale Formation, Late/Upper Cenomanian (99.6 - 93.5 Ma)

• STRATIGRAPHIC RELATIONS: From the Tropic Shale, for which lithostratigraphic relations are not discussed. AGE: Late Cenomanian, on the basis of ammonite biostratigraphy; Sciponiceras gracile. STRATIGRAPHIC POSITION: From unknown position within formation.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, concretionary, calcareous shale

• SPECIFIC LITHOLOGY: Shale. LITHIFICATION: Lithified, assumed.

Size class: macrofossils

Preservation: 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 88028: authorized by Austin Hendy, entered by Austin Hendy on 30.03.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Limited to ammonoids or bivalves described in text. NOMENCLATURE: Authoritative publication, with modern nomenclature and species-resolution identifications.
Show authors, comments, and common names
Cephalopoda
 Ammonitida - Placenticeratidae
Proplacenticeras stantoni
Proplacenticeras stantoni Hyatt 1903 ammonite