About This Item
- Full TextFull Text(subscription required)
- Pay-Per-View PurchasePay-Per-View
Purchase Options Explain
Share This Item
The AAPG/Datapages Combined Publications Database
AAPG Bulletin
Abstract
Volume:
Issue:
First Page:
Last Page:
Title:
Author(s):
Abstract:
The Cenomanian to earliest Turonian (Cretaceous) Kaskapau Formation in northwestern Alberta and adjacent British Columbia contains three shallow-marine shelf sandstone bodies encased in shale: the Doe Creek, Pouce Coupe, and Howard Creek members. These sandstone bodies were deposited in a retrogradational pattern, subparallel to the paleoshoreline of the underlying Dunvegan Formation. They represent distal-deltaic sedimentation during sea level lowstands or stillstands that punctuated the overall transgression represented by the shale of the Kaskapau Formation. A thin, slightly to nonbioturbated finely interbedded sandstone, siltstone, and shale facies containing syneresis cracks and no benthic foraminifera (facies 4) may be important paleoenvironmentally, representing th leading edge of a progradational wedge. The sandstone bodies are bounded by disconformities. The lower disconformity is erosive, perhaps the result of wave scour associated with a minor fall in relative sea level. The upper disconformity is a flooding surface formed as relative sea level subsequently rose. Within the Doe Creek Member, the overlapping I, N, and A reservoir sandstone bodies suggest an oscillatory shoreline caused by high-frequency, relative sea level fluctuations during the overall transgression. As such, the succession represents a transgressive, high-frequency sequence set. The Howard Creek Member is directly overlain by the Second White Speckled Shale (Turonian), which represents a condensed section having good source rock potential. The latter unit was deposited durin the peak of the marine transgression corresponding to an eustatic highstand.
Pay-Per-View Purchase Options
The article is available through a document delivery service. Explain these Purchase Options.
Watermarked PDF Document: $14 | |
Open PDF Document: $24 |
AAPG Member?
Please login with your Member username and password.
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].