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Full-Text Articles in Physical Sciences and Mathematics
Allostratigraphy Of The Viking And Joli Fou Formations, The Lower Colorado Group (Upper Albian), Central Alberta And Saskatchewan, Western Canada Foreland Basin, Matea Drljepan
Electronic Thesis and Dissertation Repository
Strata of the Late Albian Lower Colorado Group are widely distributed in subsurface and outcrop in the Western Canada Foreland Basin. The rocks represent depositional environments ranging from alluvial to offshore marine. The Lower Colorado Group comprises, in ascending stratigraphic order, the Joli Fou, Viking, Westgate, and Fish Scales formations. Mudrocks of the Joli Fou Formation record a time when the interior of North America was flooded by a shallow sea that led to the connection of the Polar Ocean and the Gulf of Mexico. Ensuing sea-level fall and regression led to deposition of Viking Formation sandstone across much of …
Sedimentology And Stratigraphy Of The Upper Cretaceous Puskwaskau Formation In North-Central Alberta, Western Canada Foreland Basin, Omar Al-Mufti
Sedimentology And Stratigraphy Of The Upper Cretaceous Puskwaskau Formation In North-Central Alberta, Western Canada Foreland Basin, Omar Al-Mufti
Electronic Thesis and Dissertation Repository
The Santonian to early Campanian mudstone-dominated Puskwaskau Formation was correlated throughout a study area of 50,000 km2 in north-central Alberta using 988 well logs. Fourteen informal allomembers, established by previous studies, are bounded by regionally-mappable marine flooding and/or transgressive surfaces that are traceable for hundreds of kilometres within the study area. These laterally continuous bounding surfaces are parallel to very gently converging, and mostly terminate by onlap onto underlying surfaces. Observations in thin section and in SEM revealed ten mudstone microfacies, grouped into five microfacies associations. The facies preserve evidence for repeated storm-generated reworking of the seafloor. The Puskwaskau …
Integrating Petrophysics And Allostratigraphy To Find Sweet Spots In The Upper Cretaceous Belle Fourche And Second White Specks Alloformations, West-Central Alberta, Canada, Kienan P. Marion
Electronic Thesis and Dissertation Repository
The Upper Cretaceous Second White Specks Formation – an organic-rich, calcareous mudrock succession within the lower Colorado Group – is a prolific self-sourcing tight oil reservoir in Alberta. Due to the low porosity and permeability of this interval, localized natural fracture networks have previously provided the only means for oil to flow at economic rates. This study, focused in west-central Alberta, used allostratigraphic methods to subdivide the Second White Specks Formation into allomembers that define hydraulic flow units. The petrophysical properties (porosity, organic content, clay volume, and brittleness) of each allomember were modelled using a basic suite of geophysical wireline …
High-Resolution Allostratigraphy And Sedimentology Of Santonian - Early Campanian Wapiabi Formation In Southern Alberta, Western Canada Foreland Basin, El Mahadia I. Mohammed
High-Resolution Allostratigraphy And Sedimentology Of Santonian - Early Campanian Wapiabi Formation In Southern Alberta, Western Canada Foreland Basin, El Mahadia I. Mohammed
Electronic Thesis and Dissertation Repository
Within a 90,000 km2 study area in SW Alberta, Santonian – basal Campanian strata of the upper Wapiabi Formation are dominated by marine rocks that thin westward from ~300 ~180 m over ~300 km, reflecting apparently spatially uniform flexural subsidence driven by the static load of the orogen. A high-resolution allostratigraphic framework established ten allomembers grouped in four informal tectono-stratigraphic ‘units’, three of which were previously recognized in NW Alberta. In the north and east, the formation is dominated by mudstone organized in numerous metre-scale siltier- and sandier-upward parasequences. A lack of clinoforms and abundant wave-formed sedimentary structures suggest that …