Where: Kane County, Utah (37.1° N, 111.6° W: paleocoordinates 38.6° N, 74.4° W)
• coordinate stated in text
• outcrop-level geographic resolution
When: Sciponoceras gracile ammonoid zone, Tropic Shale Formation, Late/Upper Cenomanian (99.6 - 93.5 Ma)
• 9.1-10.7 m (30-35 feet) above base
• group of beds-level stratigraphic resolution
Environment/lithology: marine; lithified shale
Size class: macrofossils
Preservation: concretion
Reposited in the USNM
Primary reference: W. J. Kennedy and W. A. Cobban. 1990. Cenomanian micromorphic ammonites from the western interior of the USA. Palaeontology 33:379-422 [M. Clapham/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 175427: authorized by Matthew Clapham, entered by Matthew Clapham on 11.12.2015
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Alzadites incomptus Kennedy and Cobban 1990 ammonite |