Ohio Creek Site 1 (Paleocene of the United States)

Where: Colorado (40.3° N, 108.3° W: paleocoordinates 46.2° N, 89.2° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Ohio Creek Formation, Ti3 (61.7 - 56.8 Ma)

• "early Tiffanian (Ti3 lineage zone)"

Environment/lithology: channel lag; poorly lithified, pebbly sandstone

• "sandstone" that exhibits "large-scale trough-cross bedding... Clasts range in size from 2 cm clay pebbles to medium-sized sand grains"

Size class: mesofossils

Collected by B. J. Burger, J. Eberle, M. Eberle, T. Culver, P. Monaco, J. Honey, K. Lloyd in 2005; reposited in the UCM

Collection methods: surface (float), anthill,

• University of Colorado Museum collection

•specimens are "from the surfaces of anthills composed of eroded grains from lag deposits of the major sandstone units"

Primary reference: B. J. Burger. 2007. A New Late Paleocene Vertebrate Fauna from the Ohio Creek Formation of Western Colorado. Mountain Geologist 44(3):141-150 [J. Alroy/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 99821: authorized by John Alroy, entered by John Alroy on 23.11.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Testudines - Compsemydidae
Compsemys victa Leidy 1856 turtle
 Crocodylia -
? Borealosuchus sp. Brochu 1997 crocodilian
Mammalia
 Cimolesta - Cimolestidae
Gelastops parcus Simpson 1935 eutherian
 Primates - Plesiadapidae
Nannodectes simpsoni Gazin 1956 primate
 Condylarthra - Hyopsodontidae
Promioclaenus acolytus Cope 1882 condylarth
 Macroscelidea - Apheliscidae
Haplaletes pelicatus Gazin 1956 elephant shrew
 Tribosphenida - Arctocyonidae
"Mimotricentes subtrigonus" = Tricentes subtrigonus
"Mimotricentes subtrigonus" = Tricentes subtrigonus Cope 1881 condylarth