Type Geological formation Country Canada Primary Slate Overlies Milk River Formation | Other Siltstone, sandstone Named by D.B. Dowling, 1916 Named for Pakowki Lake Underlies Judith River Group | |
Thickness up to 200 metres (660 ft) Region Western Canadian Sedimentary Basin | ||
The Pakowki Formation is a stratigraphical unit of Campanian age in the Western Canadian Sedimentary Basin.
Contents
It takes the name from Pakowki Lake, and was first described in outcrop along the Pakowki Coulee by D.B. Dowling in 1916.
Lithology
The Formation is composed of grey mudstone. Olive siltstone and very fine grained sandstone can occur locally. A thin pebble conglomerate marks the base.
Distribution
The Pakowki Formation reaches a maximum thickness of 200 metres (660 ft) in central Saskatchewan. It reaches into southern Alberta, thinning out as it progresses westwards towards the Canadian Rockies foothills.
Relationship to other units
The Pakowki Formation is abruptly overlain by the Milk River Formation and gradationally overlays the Judith River Formation or Foremost Formation.
It is equivalent to the upper part of the Lea Park Formation in central Alberta. It is not differentiated from the Riding Mountain Formation to the east into eastern Saskatchewan and Manitoba.