The Lea Park Formation is a stratigraphical unit of Late Cretaceous age in the Western Canadian Sedimentary Basin , Canada .
5-600: It takes the name from the settlement of Lea Park, Alberta , located north-west of Lloydminster on the banks of the North Saskatchewan River . It was first defined in an outcrop on the river banks, located in section 15-11-54-3W4M by J.A. Allan in 1918. The early campanian age was determined from its foraminifera and mollusks found in the formation. The Lea Park Formation is composed of dark shale with minor siltstone . Calcite veins and ironstone concretions, as well as bentonite beds are found throughout
10-737: 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
15-614: The Puskwaskau Formation in north-western Alberta, and the entire formation is equivalent to part of the Wapiabi Formation in the northern Canadian Rockies Lea Park, Alberta Lea Park is an unincorporated community in Alberta , Canada. It is located in east- central Alberta , between Lloydminster and Bonnyville . The community was established on the banks of the North Saskatchewan River at its confluence with
20-677: The Vermilion River , at an elevation of 545 meters (1,788 ft). The Jubilee Regional Park , administered by the village of Marwayne , is located north of the community, along with the Lea Park golf course . The community gives the name to the Cretaceous age Lea Park Formation , which was described in an outcrop near Lea Park in 1918. 53°39′20″N 110°20′25″W / 53.65556°N 110.34028°W / 53.65556; -110.34028 This Central Alberta location article
25-559: The formation. The Lea Park Formation reaches a maximum depth of 270 metres (890 ft) in its eastern reaches. It occurs in the sub-surface in west- central Alberta and extends eastwards through north-eastern Alberta and north-western Saskatchewan . The Lea Park Formation is conformably overlain (and laterally replaced )by the Judith River Formation and conformably overlies the First White Speckled Shale of
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