Relationship To Other Units
The Lea Park Formation is conformably overlain (and laterally replaced )by the Judith River Formation and conformably overlies the First White Speckled Shale of the Colorado Group.
It is equivalent to Judith River Formation, Clagett Formation and Eagle Formation in northern Montana, and is replaced by the Belly River Formation, Pakowki Formation and Milk River Formation in southern Alberta. In eastern Saskatchewan and in Manitoba it is equivalent to the Gammon Ferruginous Member, Pembina Member and lower Millwood Member of the Pierre Shale. The Lower Lea Park correlates with the Puskwaskau Formation in north-western Alberta, and the entire formation is equivalent to part of the Wapiabi Formation in the northern Canadian Rockies
Read more about this topic: Lea Park Formation
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