Coleraine Formation (Cretaceous of the United States)

Where: Itasca County County, Minnesota (47.4° N, 93.1° W: paleocoordinates 44.3° N, 52.8° W)

• coordinate based on political unit

When: Coleraine Formation, Late/Upper Cenomanian (99.6 - 93.5 Ma)

Environment/lithology: marine; lithified sandstone

• SLOAN (1964): "The Coleraine Formation in the Mesabi District (BERQUIST 1944) comprises iron-ore conglomerate, shale, and sandstone that form a thin irregular mantle over an uneven surface on the

•underlying Precambrian bedrock."

Size class: mesofossils

Primary reference: G. R. Case. 2001. A new selachian fauna from the Coleraine Formation (Upper Cretaceous/Cenomanian) of Minnesota . Palaeontographica Abteilung A 261(Lfg. 4-6):103-112 [J. Kriwet/W. Glaeser/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 61819: authorized by Juergen Kriwet, entered by Wolfgang Glaeser on 03.07.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Hybodontiformes - Hybodontidae
Hybodus rajkovichi n. sp. elasmobranch
 Pristiformes - Pristidae
Onchopristis dunklei McNulty and Slaughter 1962 sawfish
 Lamniformes - Anacoracidae
 Lamniformes - Eoptolamnidae
Protolamna gigantea n. sp. mackerel shark
 Lamniformes - Cretoxyrhinidae
Cretolamna appendiculata Agassiz 1843 mackerel shark
Cretodus sp. Sokolov 1965 mackerel shark
Cretodus semiplicatus Agassiz 1843 mackerel shark
 Lamniformes - Odontaspididae
 Chimaeriformes - Callorhynchidae
Ischyodus sp. Egerton 1843 plownose chimaera