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Bluesky Formation
The Bluesky Formation is a stratigraphic unit of Lower Cretaceous age in the Western Canada Sedimentary Basin. It takes the name from the hamlet of Bluesky, and was first described in Shell's ''Bluesky No. 1'' well by Badgley in 1952.〔Badgley, Peter C., 1952. Notes on the subsurface stratigraphy and oil and gas geology of the Lower Cretaceous series in central Alberta (Report and seven figures); Geological Survey of Canada, Paper No. 52-11, 12 p.〕
==Lithology and Depositional Environment==
The formation is composed of mudstones, conglomerates and sandstones which can be quartzose or contain chert grains.〔 Many of the Bluesky sandstones do not display bedding features although some low and moderate-angle large scale cross-bedding has been observed in some sections. The sediments were deposited in both marginally marine nearshore and fully marine offshore settings following a transgression of the ancient Moosebar Sea. Bluesky sediments are separated from Gething strata by a scoured or loaded contact and occasionally by a burrowed ''Glossifungites'' surface. The Bluesky Formation can be very porous and produces hydrocarbons in many areas across Western Canada. Heavy oil is produced from the Bluesky formation in the Peace River area.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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