Long Fall Horizon, Rav W-1 (Paleocene of Canada)

Also known as Medicine Hat Brick and Tile Quarry (MHBT Quarry), in part

Where: Saskatchewan, Canada (49.5° N, 109.2° W: paleocoordinates 56.2° N, 83.4° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Ravenscrag Formation, Puercan (66.0 - 63.3 Ma)

• upper horizon - once thought to include reworked Cretaceous fossils, but fresh exposures confirm separation of horizons.

• bed-level stratigraphic resolution

Environment/lithology: fine channel fill; siliciclastic sediments

• point bar deposit

Size class: mesofossils

Collected by P. Johnston in 1979

Collection methods: quarrying, surface (in situ),

Primary reference: R. C. Fox. 1989. The Wounded Knee local fauna and mammalian evolution near the Cretaceous-Tertiary boundary, Saskatchewan, Canada. Palaeontographica Abteilung A 208(1-3):11-59 [J. Alroy/J. Alroy/M. Carrano]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 14756: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Cimolesta - Cimolestidae
Procerberus cf. formicarum Sloan and Van Valen 1965 eutherian
 Tribosphenida - Arctocyonidae
Oxyprimus cf. erikseni Van Valen 1978 condylarth
Protungulatum cf. donnae Sloan and Van Valen 1965 condylarth
Baioconodon sp. Gazin 1941 condylarth
 Ungulata - Hyopsodontidae
? Hyopsodontidae indet. Trouessart 1879 condylarth
 Ungulata - Periptychidae
Mimatuta sp. Van Valen 1978 condylarth
 Multituberculata -
Cimexomys minor Sloan and Van Valen 1965 multituberculate
 Multituberculata - Eucosmodontidae
"Cimexomys cf. gratus" = Stygimys gratus, "Stygimys cupressus n. sp." = Stygimys kuszmauli
"Cimexomys cf. gratus" = Stygimys gratus Jepsen 1930 multituberculate
"Stygimys cupressus n. sp." = Stygimys kuszmauli Sloan and Van Valen 1965 multituberculate
includes "S. sp." of Fox 1990, said to be new
 Multituberculata - Microcosmodontidae
"Microcosmodontinae indet." = Microcosmodontidae
"Microcosmodontinae indet." = Microcosmodontidae Holtzman and Wolberg 1977 multituberculate
 Multituberculata - Taeniolabididae
"Catopsalis cf. joyneri" = Valenopsalis joyneri, Catopsalis foliatus
"Catopsalis cf. joyneri" = Valenopsalis joyneri Sloan and Van Valen 1965 multituberculate
Catopsalis foliatus Cope 1882 multituberculate