Lea Park Fm: Early/Lower Campanian, Canada

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Nuculanida - Yoldiidae
Yoldia evansi (Meek and Hayden 1857)
Bivalvia - Mytilida - Mytilidae
Modiola meeki
corrected as Modiolus
Bivalvia - Myalinida - Inoceramidae
Inoceramus sp. Sowerby 1814
Bivalvia - Poromyida - Poromyidae
Liopistha undata
Hume 1925
Bivalvia - Pholadomyida - Pholadomyidae
Pholadomya subventricosa Meek and Hayden 1858
Bivalvia - Cardiida - Cardiidae
Protocardia borealis
Hume 1925
Bivalvia - Pholadida - Corbulidae
? Corbula sp. Bruguière 1789
Hume 1925
Bivalvia - Lucinida - Lucinidae
Lucina occidentalis
Lucina sp. Bruguière 1797
Gastropoda - Aporrhaidae
Anchura americana
Gastropoda - Naticidae
Lunatia obliquata
Cephalopoda - Ammonitida - Baculitidae
Baculites ovatus (Say 1820)
Baculites compressus Say 1920
Baculites aquilaensis Reeside 1927
Cephalopoda - Ammonitida - Scaphitidae
Acanthoscaphites sp. Nowak 1911
Cephalopoda - Nautilida - Nautilidae
Eutrephoceras sp. Hyatt 1894
see common names

Geography
Country:Canada State/province:Alberta
Coordinates: 52.8° North, 110.9° West (view map)
Paleocoordinates:59.9° North, 73.9° West
Basis of coordinate:based on nearby landmark
Geographic resolution:basin
Time
Period:Cretaceous Epoch:Late/Upper Cretaceous
Stage:Campanian 10 m.y. bin:Cretaceous 7
Key time interval:Early/Lower Campanian
Age range of interval:83.50000 - 70.60000 m.y. ago
Stratigraphy
Formation:Lea Park
Stratigraphic resolution:formation
Stratigraphy comments: STRATIGRAPHIC RELATIONS: The top of the unit is defined by an interfingering contact with the Judith River Formation. The bottom is the contact with the upper or First White Speckled Shale. In eastern Saskatchewan and southern Manitoba the Lea Park correlates with the Gammon Ferruginous, Pembina and lower Millwood members of the Pierre Shale. To the north the Labiche Formation of the Athabasca River region is partly equivalent. In the Peace River area the Puskwaskau Formation is of similar age to the lower Lea Park. In the north and central Alberta Foothills the Nomad, Chungo and Hanson members of the Wapiabi Formation are considered equivalent. In southern Alberta the Belly River, Pakowki and Milk River formations and in northern Montana their stratigraphic equivalents the Judith River, Claggett and Eagle formations are of similar age to the Lea Park. AGE: Campanian, on the basis of ammonoid biostratigraphy; Scaphites ventricosus zone. STRATIGRAPHIC POSITION: List representing lower part of formation.
Lithology and environment
Primary lithology:gray poorly lithified silty "shale"
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: Typically composed of medium to dark grey shale with minor amounts of silt. LITHIFICATION: Poorly lithified.
Environment:marine indet.
Geology comments: ENVIRONMENT: Siliciclastic marine.
Taphonomy
Modes of preservation:body,cast,mold/impression
Size of fossils:macrofossils
Collection methods and comments
Collection methods:surface (in situ),field collection
Reason for describing collection:taxonomic analysis
Museum repositories:GSC
Collection method comments: COLLECTOR: Multiple collectors. REPOSITORY: Geological Survey of Canada (GSC).
Taxonomic list comments:COVERAGE: Exhaustive for marine invertebrates. NOMENCLATURE: Not an authoritative publication, and with relatively antiquated nomenclature but species-resolution identifications.
Metadata
Database number:87439
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2009-03-17 14:54:32 Last modified:2013-11-25 13:37:23
Access level:the public Released:2009-03-17 14:54:32
Creative Commons license:CC BY
Reference information

Primary reference:

29446. P. S. Warren. 1935. The fauna of the Lea Park Shale. Transactions of the Royal Canadian Institute 20(11):223-229 [A. Hendy/A. Hendy]

Secondary references:

29449 G. S. Hume. 1925. Oil prospects in the vicinty of Battle River at the Alberta-Saskatchewan boundary. Geological Survey of Canada Summary Report [A. Hendy/A. Hendy/P. Wagner]