Regional Controls On Depositional Trends In Tidally Modified Deltas: Insights From Sequence Stratigraphic Correlation and Mapping of the Loyd And Sego Sandstones, Uinta And Piceance Basins of Utah and Colorado, U.S.A.

Burton, Darrin; Flaig, Peter P.; Prather, Timothy

doi:10.2110/jsr.2016.48

Cited by 12 publications

(4 citation statements)

References 54 publications

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“…Over the last decade or so, other detailed sedimentological studies on the Sego Sandstone have provided interpretations mostly in line with the previous literature, where depositional environments varied among deltas, estuaries and barrier systems, and with a strong emphasis on tidal or mixed tidal and wave processes (Burton et al, 2016;Burton & Wood, 2011;Painter et al, 2013;York et al, 2011). Recently, Rossi et al (2017) applied their quantitative method to two 8 m and 17 m thick sections of the lower Sego Sandstone based on the sedimentological logs from Legler et al (2014), concluding that these portions of the system varied between a tidedominated and wave-dominated classification, with varying degrees of influence by subordinate processes.…”

Section: Geological Background and Historical Views As A Strongly Tid...supporting

confidence: 69%

“…Studies interpreting similar systems became increasingly popular for rock units of different ages globally (Legler et al, 2013; McIlroy et al, 2005; Tänavsuu‐Milkeviciene & Plink‐Björklund, 2009). Although several open debates regarding the Sego remain—for example the general depositional environment, formational mechanisms of erosional surfaces, relationship with the Buck Tongue—there has been a wide and consistent agreement regarding the fundamental role of tidal process (alone or in combination with the wave process) during the accumulation of these deposits (Burton et al, 2016; Franczyk, 1989; Legler et al, 2014; Painter et al, 2013; van Cappelle et al, 2016; Willis, 2000; Willis & Gabel, 2001, 2003; York et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Reevaluating the process regime in the Sego Sandstone: Sedimentological and ichnological evidence for an underemphasised fluvial signature

Gugliotta

Collins

MacEachern

et al. 2023

The Depositional Record

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Rocks of coastal to shallow‐marine origin are challenging to interpret owing to the complex interplay of various depositional processes. This study reevaluates the relative roles of fluvial, tidal and wave processes in the Upper Cretaceous Sego Sandstone (and subordinately in the underlying Buck Tongue) of the Book Cliffs, USA, a well‐studied ancient coastal to shallow‐marine succession. Detailed sedimentological and ichnological analyses were used to interpret a previously underemphasised riverine signature, consisting of centimetre‐ to decimetre‐thick alternations of sandstone and heterolithic beds inferred to represent flood‐interflood periods of variable river discharge. Recognition of a widespread fluvial‐dominated signature across the studied units better agrees with other sedimentological and regional observations in the study area, such as high sandstone‐mudstone ratios, largely unidirectional and seaward‐oriented palaeocurrents, and modelled weak tidal conditions in the basin. When considering all of the sedimentological, ichnological and stratigraphic observations together with its regional depositional context, the Sego Sandstone/Buck Tongue system is better explained using a mixed‐energy but fluvial‐dominated deltaic model. This highlights an historical over‐interpretation of tidal processes and subordinate wave processes in the Sego Sandstone and likely in similar units. The widely used approach that emphasises only certain sedimentary features in discerning the process regime from analysis of rocks of inferred coastal to shallow‐marine origin is unrefined and may therefore underrepresent the actual complexity of these systems.

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Section: Geological Background and Historical Views As A Strongly Tid...supporting

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Reevaluating the process regime in the Sego Sandstone: Sedimentological and ichnological evidence for an underemphasised fluvial signature

Gugliotta

Collins

MacEachern

et al. 2023

The Depositional Record

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“…Fluvial influence is the key to differentiating wave‐dominated deltas from non‐deltaic shorefaces. Determination of fluvial influence, including quantitative analysis of river proportion and size of ancient systems (Hampson & Howell, ) requires detailed facies analysis, especially of the muddy deposits (Burton et al ., ; van Cappelle et al ., ).…”

Section: Introductionmentioning

confidence: 99%

Depositional facies and the sequence stratigraphic control of a mixed‐process influenced clastic wedge in the Cretaceous Western Interior Seaway: The Gallup System, New Mexico, USA

Lin

Bhattacharya

2019

Sedimentology

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Depositional facies have been hypothesized to be linked to sequence stratigraphic positions. Also, shoreline systems are built by mixed processes, including rivers, storms, fair-weather waves and tides. Resolving the complexity of shoreline deposition requires detailed quantitative facies analysis with particular attention to heterolithic successions. In this study, 71 sections in a 130 km long outcrop belt of the Cretaceous Gallup Formation in the north-west of the San Juan Basin were measured. Five major facies associations were identified using sedimentological and iconological interpretations, including offshore shelf, non-deltaic shoreline sandstones, deltas, coastal bayline and fluvial. Each facies association also comprises subordinate facies. Depositional facies interpretations are placed in a high-resolution sequence stratigraphic framework that allows for reconstructions of the palaeogeography of individual parasequence sets that demonstrate temporal and spatial evolution of facies associations and depositional processes. The results show that the Gallup is a mixed-process-controlled depositional system with fair-weather and storm-wave dominance, river influence and tideeffect, contrasting with previous interpretations of a solely fair-weather wave-dominated environment. Depositional processes and the resultant facies change with sequence stratigraphic positions in response to relative sea-level changesparticular facies are only deposited in certain systems tracts. Distinction and transition between non-deltaic shorefaces and wavedominated deltas have also been documented in this study. Non-deltaic shorefaces are characterized by homogeneous sandstones with a wide-range bioturbation index and the absence of mudstones. Wave-dominated deltas are subject to river influence and contain prodelta facies. This study shows the importance of detailed facies analysis with high-resolution sequence stratigraphic control using outcrops for documenting sedimentary processes of shallow marine shoreline systems.

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“…Similar ancient examples include the Upper Cretaceous Cliff House Sandstone (Donselaar, 1989;Olsen et al, 1999) and Hosta Tongue Sandstone (Sixsmith et al, 2008) of New Mexico, United States, the Upper Cretaceous Sego Sandstone of Utah and Colorado, United States (e.g., Gabel, 2001, 2003;Painter et al, 2013;Legler et al, 2014;Burton et al, 2016), and the Middle Jurassic Lajas Formation of the Neuquén Basin, westcentral Argentina (e.g., Rossi and Steel, 2016). In such coastal environments, process interaction is limited to the transition zones between the sections of process dominance (Rossi and Steel, 2016, Figures 20, 21), but the domains can shift through time, resulting in a successive mix of deposits in the rock record.…”

Section: Introductionmentioning

confidence: 99%

Sedimentary Architecture of Storm-Influenced Tidal Flat Deposits of the Upper Mulichinco Formation, Neuquén Basin, Argentina

et al. 2020

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This study reports on the Lower Cretaceous upper Mulichinco Formation in the Neuquén Basin, west-central Argentina. The studied succession comprises shallow marine strata, deposited in a mixed wave and tidal flat environment where ebb-tidal currents dominated. We describe mixed storm-and tide-influenced deposits within progradationally stacked high-frequency sequences and discuss process interaction, sediment dispersal, and preservation potential. These storm and tidal deposits mix spatially on bed, bedset, and sequence scales, suggesting multi-scale process interactions. The study investigates a 12-km-long continuous outcrop, oriented subparallel to the paleocoastline. The succession comprises subtidal flat and meandering tidal channel complexes, with interbedding and interfingering of storm and tidal deposits. The tidal deposits are widespread and comprise moderately sorted sandstones with bimodal paleocurrent directions, single and double mud drapes, reactivation surfaces, and inclined heterolithic stratification. Varying bimodal paleocurrent directions suggest that the paleocoastline was irregular, consisting of both protrusions and bays. Storm deposits are mainly found erosively interbedded with subtidal flat sandstones, and exhibit decimeter-thick, well-sorted hummocky and swaley cross-stratified sandstones. These storm deposits show systematic lateral variations in abundance, from dominant to absent, which are linked to subtle variations in water depth along the irregular paleocoastline. As the tidal deposits are widespread across the study area, and with no significant facies change, the varying dispersal of storm-influenced deposits is considered a product of wave refraction, with converging and diverging wave energy at interpreted positions of coastal protrusions and embayments, respectively. Consequently, the irregular paleocoastline morphology caused spatial variability in wave impact and controlled preservation of interbedded storm and tidal deposits at the coastal protrusions while facilitating complete tidal remobilization of sediments in the embayments. With no evidence for fluvial influence, ebb-tidal currents are considered as the main drivers for sediment dispersal onto the subtidal flat, through the meandering tidal channels.

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Regional Controls On Depositional Trends In Tidally Modified Deltas: Insights From Sequence Stratigraphic Correlation and Mapping of the Loyd And Sego Sandstones, Uinta And Piceance Basins of Utah and Colorado, U.S.A.

Cited by 12 publications

References 54 publications

Reevaluating the process regime in the Sego Sandstone: Sedimentological and ichnological evidence for an underemphasised fluvial signature

Reevaluating the process regime in the Sego Sandstone: Sedimentological and ichnological evidence for an underemphasised fluvial signature

Depositional facies and the sequence stratigraphic control of a mixed‐process influenced clastic wedge in the Cretaceous Western Interior Seaway: The Gallup System, New Mexico, USA

Sedimentary Architecture of Storm-Influenced Tidal Flat Deposits of the Upper Mulichinco Formation, Neuquén Basin, Argentina

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