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Steepbank River

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Series: AAPG Studies in Geology
Published: 01 January 2013
DOI: 10.1306/13371593St643561
EISBN: 9781629812649
.... These tidal inputs increased reservoir heterogeneities primarily because of successive mud decantation periods and the many reactivation or erosion surfaces. Five main reservoir heterogeneities have been described on Steepbank River outcrops: mud accumulation during channel abandonment, mud drapes along...
Journal Article
Published: 01 September 2003
Bulletin of Canadian Petroleum Geology (2003) 51 (3): 347–353.
...Michael J. Ranger; Murray K. Gingras © The Society of Canadian Petroleum Geologists 2003 Langenberg et al. (2002) purport to identify discrete ‘channel complexes’ in outcrop exposures along the Steepbank River of northeastern Alberta, and they claim to have extrapolated these channel...
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First thumbnail for: DISCUSSION of C.W. Langenberg, F.J. Hein, D. Lawto...
Second thumbnail for: DISCUSSION of C.W. Langenberg, F.J. Hein, D. Lawto...
Third thumbnail for: DISCUSSION of C.W. Langenberg, F.J. Hein, D. Lawto...
Journal Article
Published: 01 September 2003
Bulletin of Canadian Petroleum Geology (2003) 51 (3): 354–366.
... of responding authors. Ranger and Gingras (this issue) express the opinion that our definition of channel complexes is “simplistic, ill-defined, and of questionable validity;” and that “their channel complex model from the Steepbank River outcrops and surrounding wells is based on questionable criteria...
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First thumbnail for: REPLY TO DISCUSSION of C.W. Langenberg, F.J. Hein,...
Second thumbnail for: REPLY TO DISCUSSION of C.W. Langenberg, F.J. Hein,...
Third thumbnail for: REPLY TO DISCUSSION of C.W. Langenberg, F.J. Hein,...
Journal Article
Published: 01 March 2002
Bulletin of Canadian Petroleum Geology (2002) 50 (1): 178–204.
... River, north of Fort McMurray, near the Suncor Steepbank Mine. We have identified at least four channel complexes based on stratal bounding surfaces, arrangement of exposed lithofacies, and consistent paleoflow patterns. The lower part of each channel complex contains medium to large-scale, trough...
Image
Photo of Steepbank River, Outcrop 4, Section 1, taken from the air normal to the outcrop face. Compare this photo to that of Langenberg et al. (2002, their Fig. 12). Langenberg et al. claim that Channel Complex 3 is separated from Channel Complex 2 by an inclined discordant surface, interpreted as an episode of cut and fill. In reality, it can be seen here that the contact is more or less horizontal (and parallel to the upper contact of Channel Complex 3 with the upper McMurray). There is no indication of a cut and fill incision. To the south (left in the photo), the contact is covered with scree, but nowhere can it be seen to incise down discordantly into the underlying strata. The IHS beds overlying and underlying the contact do dip in apparently opposing directions and are discordant in that regard, but the contact itself is generally horizontal on this outcrop face.
Published: 01 September 2003
Fig. 1. Photo of Steepbank River, Outcrop 4, Section 1, taken from the air normal to the outcrop face. Compare this photo to that of Langenberg et al. (2002 , their Fig. 12). Langenberg et al. claim that Channel Complex 3 is separated from Channel Complex 2 by an inclined discordant surface
Image
Photo of Steepbank River, Outcrop 3. The laterally accreting beds of the informal middle McMurray member are overlain by vertically accreting beds of the informal upper McMurray member. Besides the obvious architectural contrast in bedding style, there is a distinct change in facies and facies association. Moreover, allostratigraphic bounding discontinuities have been recognized and mapped regionally from the upper McMurray member over a wide area in the subsurface. Langenberg et al. (2002) propose lumping these informal and widely-used units into a single upper McMurray member, claiming it is not possible for them to biostratigraphically distinguish between the middle and upper McMurray. However, biostratigraphic and chronostratigraphic criteria have no place in a lithostratigraphic scheme.
Published: 01 September 2003
Fig. 3. Photo of Steepbank River, Outcrop 3. The laterally accreting beds of the informal middle McMurray member are overlain by vertically accreting beds of the informal upper McMurray member. Besides the obvious architectural contrast in bedding style, there is a distinct change in facies
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—Outcrop of McMurray Formation, Steepbank River. Devonian limestone (a) is overlain by trough cross-bedded sands (b) and epsilon cross-strata (c) of middle member. Above are horizontally bedded units of upper member (d-h).
Published: 01 August 1985
Figure 5 —Outcrop of McMurray Formation, Steepbank River. Devonian limestone (a) is overlain by trough cross-bedded sands (b) and epsilon cross-strata (c) of middle member. Above are horizontally bedded units of upper member (d-h).
Image
—McMurray Formation outcrop on Steepbank River. Dipping epsilon cross-strata top out near top of formation, indicating that large channels existed in this area until very near end of McMurray time. Bed marked h correlates with unit h of Figure 5, located a few kilometers away.
Published: 01 August 1985
Figure 10 —McMurray Formation outcrop on Steepbank River. Dipping epsilon cross-strata top out near top of formation, indicating that large channels existed in this area until very near end of McMurray time. Bed marked h correlates with unit h of Figure 5 , located a few kilometers away.
Journal Article
Published: 01 December 2018
Bulletin of Canadian Petroleum Geology (2018) 66 (4): 725–751.
... in outcrop exposures of the middle McMurray Formation: laterally-accreting point-bar deposits and forward-accreting compound-dune deposits. Bed orientation data, when compared to sediment transport directions, show that outcrops along the Steepbank River are composed of stacked lateral accretion bar elements...
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First thumbnail for: Using structure-from-motion photogrammetry to reco...
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Examples of burrowed beds of the middle McMurray Formation exposed along the lower Steepbank and Christina rivers. (A) Cylindrichnus with 2–5 cm long burrows at a lower Steepbank River outcrop. Modified from Jablonski and Dalrymple (2016). (B) Cylindrichnus with 5 cm long burrows and Skolithos with 10–20 cm long burrows at a Christina River outcrop. Modified from Martinius et al. (2015). [Colour online.]
Published: 17 August 2018
Fig. 8. Examples of burrowed beds of the middle McMurray Formation exposed along the lower Steepbank and Christina rivers. (A) Cylindrichnus with 2–5 cm long burrows at a lower Steepbank River outcrop. Modified from Jablonski and Dalrymple (2016) . (B) Cylindrichnus with 5 cm long burrows
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A) Location map of the studied outcrops in relation to Fort McMurray, Alberta, Canada. B) Map showing the exact meander bend along the Steepbank River where the Steepbank #3 outcrops are located, denoted by the black box. C) Satellite image of the Steepbank #3 outcrops, located at 57° 01ʹ 0.75ʺ N, 111° 26ʹ2.19ʺ W. D) Map showing the exact meander bend along the MacKay River where the Amphitheatre outcrop is located, denoted by the black box. E) Satellite image of the Amphitheatre outcrop, located at 57° 11 ʺ34.30ʺ N, 111° 39ʹ 50.09ʺ W. Yellow lines on the satellite images indicate the location where tadpole plots are produced for each outcrop in this study. Satellite images are courtesy of Google Earth © 2017.
Published: 01 December 2018
Figure 1. A) Location map of the studied outcrops in relation to Fort McMurray, Alberta, Canada. B) Map showing the exact meander bend along the Steepbank River where the Steepbank #3 outcrops are located, denoted by the black box. C) Satellite image of the Steepbank #3 outcrops, located at 57
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Impact of salt tectonism on the backwater and tidal lengths of the middle McMurray Formation axial channel belt from the south-central Athabasca area. Low gradient channel slope profiles resulted in a strongly sinuous meander-belt architecture characterized by channel expansion, translation, and rotation as the meander bends migrated northward. The channel belt transitioned northward onto an unstable depositional surface of differentially subsided Devonian fault blocks, resulting in a branching into a more linear distributary tide-impacted channel network. The floors along these tens-of-kilometres long distributary channels were impacted by salt tectonism that removed up to 120 m of salt section in the Devonian substrate. Steep gradient slopes resulted northward of an avulsion node in the area of the type section/lower Steepbank River. The salt tectonism-induced allogenic forcing resulted in coinciding backwater and tidal lengths northward of the lower Steepbank River. Saline seeps into channel deposits elevated salinity levels permitting colonies of brackish-water macroinvertebrates. [Colour online.]
Published: 17 August 2018
-of-kilometres long distributary channels were impacted by salt tectonism that removed up to 120 m of salt section in the Devonian substrate. Steep gradient slopes resulted northward of an avulsion node in the area of the type section/lower Steepbank River. The salt tectonism-induced allogenic forcing resulted
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Locations of measured cores and petrographical and palynological samples for this study. Location of stratigraphic cross-sections [Figs. 6–7 (bold) and Crerar, 2003] are also shown. Note also that the location of the modern Lower Steepbank River roughly coincides with the position of the main Cretaceous-aged paleovalley where the thickest accumulation of McMurray Formation sand occurs (see Figs.12–13).
Published: 01 June 2007
Fig. 4. Locations of measured cores and petrographical and palynological samples for this study. Location of stratigraphic cross-sections [Figs. 6 –7 (bold) and Crerar, 2003 ] are also shown. Note also that the location of the modern Lower Steepbank River roughly coincides with the position
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Published: 01 June 2007
deposits ( Ainsworth and Walker, 1994 ; Lavigne, 1999 ). Point-bar thicknesses and average dips from Mossop and Flach (1983) and Langenberg et al. (2003) (their figure 8 ) are based on sedimentological descriptions of Steepbank River outcrops and Muwais and Smith (1990) is based on dipmeter data
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Fig. 2.
Published: 12 April 2016
A–A′ is illustrated ( Fig. 5B ). Modified from Broughton (2013 a , 2015) . Two southeast-oriented bitumen mining districts aligned along McMurray fills of multi-kilometre long troughs on the sub-Cretaceous structure. The Steepbank River mining district, 5–10 km south of the study area, includes Suncor Millennium
Journal Article
Published: 17 August 2018
Canadian Journal of Earth Sciences (2018) 55 (12): 1354–1383.
...Fig. 8. Examples of burrowed beds of the middle McMurray Formation exposed along the lower Steepbank and Christina rivers. (A) Cylindrichnus with 2–5 cm long burrows at a lower Steepbank River outcrop. Modified from Jablonski and Dalrymple (2016) . (B) Cylindrichnus with 5 cm long burrows...
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First thumbnail for: Salt tectonism and distribution of brackish-water ...
Second thumbnail for: Salt tectonism and distribution of brackish-water ...
Third thumbnail for: Salt tectonism and distribution of brackish-water ...
Journal Article
Published: 01 March 2017
Bulletin of Canadian Petroleum Geology (2017) 65 (1): 64–86.
... ), and to propose that the diamictite be given formation status with the name Steepbank Formation. Exploration drilling has produced thousands of cores from the Athabasca Oil Sands in the region east of the Athabasca River and north of the Clearwater River ( Fig. 2 ). The majority of the core holes that have...
Journal Article
Published: 12 April 2016
Canadian Journal of Earth Sciences (2016) 53 (9): 896–930.
... A–A′ is illustrated ( Fig. 5B ). Modified from Broughton (2013 a , 2015) . Two southeast-oriented bitumen mining districts aligned along McMurray fills of multi-kilometre long troughs on the sub-Cretaceous structure. The Steepbank River mining district, 5–10 km south of the study area, includes Suncor Millennium...
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First thumbnail for: Alignment of fluvio-tidal point bars in the middle...
Second thumbnail for: Alignment of fluvio-tidal point bars in the middle...
Third thumbnail for: Alignment of fluvio-tidal point bars in the middle...
Journal Article
Published: 25 November 2014
Canadian Journal of Earth Sciences (2015) 52 (1): 21–50.
... south to the mines near Steepbank ( Fig. 2B ). Figure 13 illustrates some examples of these mine cuts that exposed differentially subsided fault blocks of Devonian-McMurray linked strata. Figure 13A is an example of an 800 m long fault block of lower McMurray strata exposed within the Muskeg River...
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First thumbnail for: Syndepositional architecture of the northern Athab...
Journal Article
Journal: AAPG Bulletin
Published: 01 August 1985
AAPG Bulletin (1985) 69 (8): 1195–1207.
...Figure 5 —Outcrop of McMurray Formation, Steepbank River. Devonian limestone (a) is overlain by trough cross-bedded sands (b) and epsilon cross-strata (c) of middle member. Above are horizontally bedded units of upper member (d-h). ...
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First thumbnail for: Depositional Environments of Lower Cretaceous McMu...
Second thumbnail for: Depositional Environments of Lower Cretaceous McMu...
Third thumbnail for: Depositional Environments of Lower Cretaceous McMu...