High-resolution sequence stratigraphy of clastic shelves I: Units and bounding surfaces

Zecchin, Massimo; Catuneanu, Octavian

doi:10.1016/j.marpetgeo.2012.08.015

Cited by 245 publications

(113 citation statements)

References 87 publications

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“…16; cf. Zecchin and Catuneanu, 2013). This progradation clearly suggests rapid basinward migration of the shoreline with relative fall in sea level.…”

Section: Sequence Architecture and Discussionmentioning

confidence: 92%

“…6; e.g., Vail et al, 1991;Mitchum and Van Wagoner, 1991;Strasser et al, 1999). Parasequences may also be autocyclic in origin (Catuneanu et al, 2009;Zecchin and Catuneanu, 2013). However local and regional tectonic activity can also play a significant role in creation of accommodation space and hence in determining the stacking pattern.…”

Section: Sequence Architecture and Discussionmentioning

confidence: 99%

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Forced regressive wedge in the Mesoproterozoic Koldaha Shale, Vindhyan basin, Son valley, central India

Samanta

Mukhopadhyay

Eriksson

2016

Marine and Petroleum Geology

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The present paper highlights the sequence development within the Mesoproterozoic Koldaha Shale Member of the Kheinjua Formation, Vindhyan Supergroup which records the occurrence of a forced regressive wedge and associated discontinuity surfaces at the base of the wedge. Nine lithofacies have been identified within the study area that are grouped into three lithofacies associations varying in depositional setting from outer shelf, through shorefaceforeshore-beach to continental braidplain. The outer shelf sediments are aggradational to slightly progradational representing highstand systems tract. The rapidly progradational, wedge-shaped shoreface to foreshore-beach succession occurs sharply or erosively above the outer shelf sediments and is bounded by a regressive surface of marine erosion (RSME) at the base and by a subaerial unconformity at the top. This, along with its downstepping trajectory, supports deposition of this sedimentary wedge during falling sea level. A laterally extensive soft sediment deformation zone occurs at the base of the wedge.The forced regressive wedge is incised by fluvial braidplain deposits that rest on an erosive surface representing a sequence boundary. The thin braidplain deposits are the product of aggradation during a subsequent early rise in relative sea level, and thus, they are inferred to represent a lowstand systems tract. The constituent architectural elements that characterize the braidplain deposits are downstream accretion elements and small channel elements. Further 1 landward, the base and top of the shoreface wedge merge to form an unconformity across deposits that rest directly on the outer shelf sediments. The identification of forced regressive wedges has significant economic importance in view of the potential occurrence of hydrocarbons within the Proterozoic formations.

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“…16; cf. Zecchin and Catuneanu, 2013). This progradation clearly suggests rapid basinward migration of the shoreline with relative fall in sea level.…”

Section: Sequence Architecture and Discussionmentioning

confidence: 92%

Section: Sequence Architecture and Discussionmentioning

confidence: 99%

Forced regressive wedge in the Mesoproterozoic Koldaha Shale, Vindhyan basin, Son valley, central India

Samanta

Mukhopadhyay

Eriksson

2016

Marine and Petroleum Geology

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“…The increase on dip angles from older to youngest slope clinoforms (Fig. 7B) in association 1 suggests an increase in sediment supply and sediment caliper as a result of base level fall and erosion on the shelf (e.g., Zecchin & Catuneanu, 2013;Safronova et al, 2014). While in the first parts of association 1, lower-angle slope clinoforms (maximum slope angle of approximately 1º) are associated to flat to mildly descending shelf-edge trajectories, steeper clinoforms in the last stages of the association (maximum slope angle reaching 2º) are related to strongly descending trajectories (Figs.…”

Section: Discussionmentioning

confidence: 98%

“…4, 7 and 14), indicating conditions of forced regressions and relatively high sediment supply (e.g., Zecchin & Catuneanu, 2013). In this context, seismic facies associations with their related depositional elements and erosive features represent tridimensional depositional intervals characterized by specific paleoenvironmental conditions and associated base-level behavior (Fig.…”

Section: Discussionmentioning

confidence: 99%

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Seismic expression of depositional elements associated with a strongly progradational shelf margin: northern Santos Basin, southeastern Brazil

Berton

Vesely

2016

Braz. J. Geol.

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Seismic facies analysis and seismic geomorphology are important tools for the analysis of depositional elements in subsurface. This paper aimed to investigate the character and genesis of depositional elements and erosive features associated with an Eocene progradational shelf margin in northern Santos Basin. Identified seismic facies are interpreted as shelf-margin deltas/shoreface deposits, tangential (oblique) clinoforms, sigmoidal clinoforms, topset reflectors, mass-transport deposits and turbidites. These facies are grouped into four associations representing periods of relatively constant environmental conditions. Association 1 is composed of shelf-margin deltas/shoreface deposits, tangential clinoforms and extensive sand--rich turbidites disposed as submarine channels and frontal splays. A progressive increase in clinoform angle within this association has been identified, culminating in high-relief sigmoidal clinoforms with less voluminous turbidites of facies association 2. Association 3 is composed by subparallel to divergent topset reflectors, interpreted as continental to shelfal deposits placed during base-level rises. These are always truncated basinward by slump scars, formed as a consequence of sediment overload at the shelf margin during aggradations. Association 4 is composed of sigmoidal clinoforms, mass-transport deposits and turbidites. Early clinoforms are steeper as a consequence of the topography of the slump scars. Subsequently, dip angles become progressively gentler as the system approach to the equilibrium profile. The steep physiography was favorable for canyon incision, which played an important role in turbidite deposition. Mass-transport deposits, formed subsequent to slope collapse, are composed of mud-rich diamictites, and show strong internal deformation.KEYWORDS: Seismic facies; Seismic geomorphology; Deep-marine deposition; Mass-transport deposits; Turbidite systems. RESUMO: A análise de fácies sísmicas e a geomorfologia sísmica são ferramentas importantes para o estudo de elementos deposicionais em subsuperfície. Neste trabalho foram avaliadas as características e a gênese de elementos deposicionais e de feições erosivas associadas a uma margem progradante desenvolvida no Eoceno no norte da bacia de

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The regressive surface of marine erosion generated by tides: A case study from a Pleistocene tidal sand ridge sequence, Calabria, Southern Italy

Longhitano,

Miocic

2024

The Depositional Record

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The regressive surface of marine erosion is a key stratigraphic discontinuity used to identify episodes of forced regression in marine strata. Typically, it marks the base of shallow‐marine (e.g. shoreface and deltaic) deposits eroding over relatively deeper‐water (e.g. shelf and prodelta) lithofacies. While well‐documented in marginal‐marine areas, its occurrence in offshore or strait settings dominated by tidal currents is less understood. This study investigates lower Pleistocene outcrops in the Plio‐Quaternary Siderno Basin, Calabria, southern Italy, where tidal sand ridges developed in a Mediterranean strait. High‐resolution drone images reveal a basinward‐dipping basal surface marking the onset of tidally dominated sedimentation. This discontinuity separates underlying shelf fines from overlying cross‐stratified, tidal bioclastic/siliciclastic arenites, indicating a prolonged period of marine regression in a strait setting. The stratal architecture of the ridges shows cross‐strata aggradation in up‐dip sections, transitioning down‐dip into balanced aggrading/prograding strata, and further basinward into markedly prograding deposits. These features are interpreted to reflect an initial phase of normal regression, evolving into forced regression. This latter stage is characterised by a progressive deepening of the basal discontinuity, causing more erosional effects on the underlying beds, with a vertical basinward fall of about 60 m over 2 km. Internal foreset geometry (two‐dimensional vs. three‐dimensional cross strata) and their vertical and lateral repetition indicate stages of equilibrium and disequilibrium for tidal bedforms, reflecting varying current speeds and water depth changes. The regressive surface of marine erosion here is formed by tidal currents, rather than waves, suggesting a new type of sequence stratigraphic discontinuity associated with tide‐dominated settings.

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High-resolution sequence stratigraphy of clastic shelves I: Units and bounding surfaces

Cited by 245 publications

References 87 publications

Forced regressive wedge in the Mesoproterozoic Koldaha Shale, Vindhyan basin, Son valley, central India

Forced regressive wedge in the Mesoproterozoic Koldaha Shale, Vindhyan basin, Son valley, central India

Seismic expression of depositional elements associated with a strongly progradational shelf margin: northern Santos Basin, southeastern Brazil

The regressive surface of marine erosion generated by tides: A case study from a Pleistocene tidal sand ridge sequence, Calabria, Southern Italy

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