Where: Dewey County, South Dakota (45.1° N, 101.2° W: paleocoordinates 50.9° N, 74.9° W)
• coordinate stated in text
• outcrop-level geographic resolution
When: Hoploscaphites nicolletii ammonoid zone, Trail City Member (Fox Hills Formation), Late/Upper Maastrichtian (70.6 - 66.0 Ma)
• Upper nicolletii Assemblage Zone (UNAZ)
• group of beds-level stratigraphic resolution
Environment/lithology: marine; lithified siliciclastic sediments
Size class: macrofossils
Reposited in the YPM
Primary reference: N. H. Landman and K. M. Waage. 1993. Scaphitid ammonites of the Upper Cretaceous (Maastrichtian) Fox Hills Formation in South Dakota and Wyoming. Bulletin of the American Museum of Natural History 215:1-257 [A. Hendy/A. Hendy/A. Hendy]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 178562: authorized by Matthew Clapham, entered by Matthew Clapham on 07.05.2016
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Jeletzkytes spedeni Landman and Waage 1993 ammonite
Hoploscaphites nicolletii Morton 1842 ammonite |