About This Item
- Full TextFull Text(subscription required)
- Pay-Per-View PurchasePay-Per-View
Purchase Options Explain
Share This Item
In this paper is presented the subsurface information concerning the Pale beds and the Foremost formation as disclosed by seven deep wells drilled in the Lethbridge-Brooks area of Alberta. The nomenclature of the formations and some regional aspects of lithology, sedimentation, and thickness are considered briefly. These formations are Cretaceous in age, and are the equivalent of the Judith River beds of Montana.
The Foremost formation consists largely of brackish-water, lagoonal deposits of dark gray shales with subordinate sandstone, carbonaceous matter, and oyster beds. A prominent coal series (McKay) is recognized near the base, and another coal horizon (Taber) is present at the top of the formation in some parts of the area. The average thickness of the formation is 400 feet, but it is somewhat less farther northeast.
The Pale beds consist chiefly of fresh-water deltaic deposits of light gray sandstones and shales. A widespread coal series (Lethbridge coal measures) is present at the top. The formation is about 740 feet thick in the southwestern part of this area, but becomes thinner northeastward.
Stratigraphic evidence indicates that some western land mass was the source of the sediments. Persistent coal measures at the base of the Foremost and the top of the Pale beds are useful for correlation.
Pay-Per-View Purchase Options
The article is available through a document delivery service. Explain these Purchase Options.
|Protected Document: $10|
|Internal PDF Document: $14|
|Open PDF Document: $24|
Members of AAPG receive access to the full AAPG Bulletin Archives as part of their membership. For more information, contact the AAPG Membership Department at [email protected].