Facies And Architectural Analysis To Interpret Avulsion Style and Variability: Upper Cretaceous Blackhawk Formation, Wasatch Plateau, Central Utah, U.S.A

Flood, Yvette S.; Hampson, Gary J.

doi:10.2110/jsr.2014.59

Cited by 35 publications

(40 citation statements)

References 55 publications

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“…Detailed analysis of selected channelized fluvial sandbodies and associated non-channelized floodplain deposits indicates that avulsion was the predominant control on local floodplain sedimentation and stratal architecture in alluvial-to-coastal-plain strata of the Blackhawk Formation (Hampson et al 2013;Flood & Hampson 2014). Multistorey sandbodies record vertical stacking of channel-belt deposits but generally are not confined above a deep, 'master' erosion surface (e.g.…”

Section: Switching Of Wave-dominated Delta Lobes Expressed Within Parmentioning

confidence: 99%

“…In addition to avulsion by reoccupation, stratigraphicarchitectural relationships between channelized fluvial sandbodies and non-channelized floodplain deposits indicate that avulsion also took place via the progradation of crevasse splays (to produce 'stratigraphically transitional avulsion deposits' sensu Jones & Hajek 2007), and by incision (to produce 'stratigraphically abrupt avulsion deposits' sensu Jones & Hajek 2007) (Flood & Hampson 2014). There is no apparent temporal or spatial trend in avulsion style in the Blackhawk Formation, implying that avulsions occurred in a similar manner for a range of distances from the coeval shoreline (c. 0-100 km) and a range of long-term tectonic subsidence rates (80-700 m Ma −1 ) (Flood & Hampson 2014). Given their apparent insensitivity to a wide range of boundary conditions, avulsions were probably autogenic in origin.…”

Section: Switching Of Wave-dominated Delta Lobes Expressed Within Parmentioning

confidence: 99%

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Towards a sequence stratigraphic solution set for autogenic processes and allogenic controls: Upper Cretaceous strata, Book Cliffs, Utah, USA

Hampson

2016

JGS

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Upper Cretaceous strata exposed in the Book Cliffs of east-central Utah are widely used as an archetype for the sequence stratigraphy of marginal-marine and shallow-marine deposits. Their stratal architectures are classically interpreted in terms of accommodation controls that were external to the sediment routing system (allogenic), and that forced the formation of flooding surfaces, sequence boundaries, and parasequence and parasequence-set stacking patterns. Processes internal to the sediment routing system (autogenic) and allogenic sediment supply controls provide alternatives that can plausibly explain aspects of the stratal architecture, including the following: (1) switching of wave-dominated delta lobes, expressed by the internal architecture of parasequences; (2) river avulsion, expressed by the internal architecture of multistorey fluvial sandbodies and related deposits; (3) avulsion-generated clustering of fluvial sandbodies in delta plain strata; (4) 'autoretreat' owing to increasing sediment storage on the delta plain as it lengthened during progradation, expressed by progradational-toaggradational stacking of parasequences; (5) sediment supply control on the stacking of, and sediment grain-size fractionation within, parasequence sets. The various potential allogenic controls and autogenic processes are combined to form a sequence stratigraphic solution set. This approach avoids anchoring of sequence stratigraphic interpretations on a specific control and acknowledges the non-unique origin of stratal architectures.

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Section: Switching Of Wave-dominated Delta Lobes Expressed Within Parmentioning

confidence: 99%

Section: Switching Of Wave-dominated Delta Lobes Expressed Within Parmentioning

confidence: 99%

Towards a sequence stratigraphic solution set for autogenic processes and allogenic controls: Upper Cretaceous strata, Book Cliffs, Utah, USA

Hampson

2016

JGS

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“…Channelized fluvial sandbodies consist principally of mediumgrained, cross-bedded sandstones with subordinate fine-grained sandstones and mudclast conglomerates (Hampson et al 2013;Flood & Hampson 2014). Floodplain and lagoonal deposits mainly comprise siltstones, mudstones and coals, but contain sheets and lenses of very-fine-to fine-grained sandstones that are interpreted as crevasse-splay deposits (Flood & Hampson 2014).…”

Section: Variations In Ntg Ratiomentioning

confidence: 99%

“…Avulsion-related stratigraphic architectures have also been characterized in ancient fluvial successions (e.g. Kraus 1996;Kraus & Wells 1999;Mohrig et al 2000;Jones & Hajek 2007;Straub et al 2009;Flood & Hampson 2014), and recent work on large-scale outcrops of fluvial strata suggests that avulsion and similar autogenic behaviours may result in non-random stratigraphic architectures that are at least partly independent of allogenic controls on stratigraphy and palaeogeography (e.g. sea level, tectonics, climate) (Hajek et al 2010;Wang et al 2011;Flood & Hampson 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Such spatial distributions are not commonly considered in current reservoir modelling workflows. Previous work has established the stratigraphic framework and context of the outcrop analogue (Hampson et al 2012), interpreted avulsion as the dominant control on stratigraphic architecture using internal sandbody architecture (Hampson et al 2013) and character of fine-grained floodplain deposits (Flood & Hampson 2014), and quantitatively described avulsion-generated patterns of sandbody distribution using spatial statistical tools (Flood & Hampson 2015). In this paper, we use concepts and data from this previous work to construct and analyse a suite of three-dimensional (3D), object-based reservoir models for different stratigraphic intervals and palaeogeographical locations in the play-scale outcrop analogue.…”

Section: Introductionmentioning

confidence: 99%

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Object-based modelling of avulsion-generated sandbody distributions and connectivity in a fluvial reservoir analogue of low to moderate net-to-gross ratio

Villamizar

Hampson

Flood

et al. 2015

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Data from a large-scale outcrop analogue (Upper Cretaceous Blackhawk Formation, Wasatch Plateau, central Utah, USA) were used to construct three-dimensional, object-based reservoir models of low to moderate net-to-gross (NTG) ratios (11-32%). Two descriptive spatial statistical measures, lacunarity and Ripley's K function, were used to characterize sandbody distribution patterns in the different models. Lacunarity is sensitive to sandbody abundance and NTG ratio, while Ripley's K function identifies clustered, random and regular spacing of sandbodies. The object-based modelling algorithm reproduces sandbody dimensions and abundances, but patterns of sandbody distribution generated by river avulsion are poorly replicated because pseudo-well spacing provides only limited constraint on sandbody positions.In common with previous studies, the connected sand fraction in the reservoir models increases with increasing NTG ratio and increasing range of sandbody orientations, but there is significant stochastic variation around both of these trends. In addition, low NTG reservoir models in which sandbodies exhibit strong clustering may also have a low connected sand fraction across the model volume because the sandbody clusters are widely spaced and, thus, tend to be isolated from each other. Consequently, connected sand fraction could be overestimated if avulsion-generated sandbody clusters are not identified and replicated in models of such reservoirs. Research article petgeo2015-004r esearch-articleResearch article10.1144/petgeo2015-004Object-based modelling of avulsion-generated sandbody distributions and connectivity in a fluvial reservoir analogue of low to moderate net-to-gross ratioCarlos

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Soils, Chemical Weathering, and Climate Change in Earth History

Driese

Nordt

Stinchcomb

2021

Hydrogeology, Chemical Weathering, and Soil Formation

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Facies And Architectural Analysis To Interpret Avulsion Style and Variability: Upper Cretaceous Blackhawk Formation, Wasatch Plateau, Central Utah, U.S.A

Cited by 35 publications

References 55 publications

Towards a sequence stratigraphic solution set for autogenic processes and allogenic controls: Upper Cretaceous strata, Book Cliffs, Utah, USA

Towards a sequence stratigraphic solution set for autogenic processes and allogenic controls: Upper Cretaceous strata, Book Cliffs, Utah, USA

Object-based modelling of avulsion-generated sandbody distributions and connectivity in a fluvial reservoir analogue of low to moderate net-to-gross ratio

Soils, Chemical Weathering, and Climate Change in Earth History

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