School Well (Paleocene of the United States)

Also known as JHH L6427

Where: Dawson County, Montana (47.1° N, 104.8° W: paleocoordinates 52.9° N, 80.8° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: upper Ludlow Member (Fort Union Formation), Torrejonian (63.3 - 61.7 Ma)

Environment/lithology: terrestrial

Primary reference: J. P. Hunter. 1997. Mammals and mollusks across the Cretaceous-Tertiary boundary from Makoshika State Park and vicinity (Williston Basin), Montana. Contributions to Geology, University of Wyoming 32(1):61-114 [J. Alroy/J. Alroy/M. Uhen]more details

PaleoDB collection 14885: authorized by John Alroy, entered by John Alroy on 05.08.1996

Creative Commons license: CC BY (attribution)

Taxonomic list

• entirely from one locality
"60 m above the Cretaceous-Tertiary boundary"
 Primates - Paromomyidae
Paromomys maturus Gidley 1923 primate
 Ungulata - Hyopsodontidae
"Promioclaenus lemuroides" = Ellipsodon lemuroides
"Promioclaenus lemuroides" = Ellipsodon lemuroides Matthew 1897 condylarth
 Ungulata - Periptychidae
Periptychus sp. Cope 1881 condylarth
 Multituberculata - Ptilodontidae
Ptilodus montanus Douglass 1908 multituberculate