Stratigraphic framework of sediment-starved sand ridges on a mixed siliciclastic/carbonate inner shelf; west-central Florida

Edwards, J.H; Harrison, Sylvia; Locker, Stanley D.; Hine, Albert C.; Twichell, David C.

doi:10.1016/s0025-3227(03)00183-x

Cited by 28 publications

(11 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…17B), seems to correlate well with observations in tide‐built and tide‐influenced modern sand ridges (McCave & Langhorne, 1982; Davis et al. , 1993; Edwards et al. , 2003; Snedden & Dalrymple, 1999).…”

Section: Discussionsupporting

confidence: 77%

“…Interestingly, many tide‐built modern sand ridges are thought to lack mudstone layers or muddy facies (McCave & Langhorne, 1982; Davis et al. , 1993; Edwards et al. , 2003) and in those recent examples in which mud couplets do exist (for example, offshore sand ridges of East China Sea), they are interpreted as older estuarine deposits forming the ‘core’ of the sand ridge (Berné et al.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Sharp‐based marine sandstone bodies in the Mulichinco Formation (Lower Cretaceous), Neuquén Basin, Argentina: remnants of transgressive offshore sand ridges

Schwarz¹

2012

Sedimentology

View full text Add to dashboard Cite

The interpretation of sharp‐based shallow‐marine sandstone bodies encased in offshore mudstones, particularly transgressive units, has been a subject of recent debate. This contribution provides a multiple‐dataset approach and new identification criteria which could help in the recognition of transgressive offshore sandstone bodies worldwide. This study integrates sedimentology, ichnology, taphonomy and palaeoecology of Mulichinco Formation strata in the central Neuquén Basin (Argentina) in order to describe and interpret sharp‐based sandstone bodies developed in ramp‐type marine settings. These bodies are sandwiched between finer‐grained siliciclastics beneath and thin carbonates above. The underlying sediments comprise progradational successions from offshore mudstones to offshore transition muddy sandstones, grading occasionally into lower shoreface sandstones. The surfaces capping the regressive siliciclastics are flat and regionally extensive, and are demarcated by skeletal concentrations and a Glossifungites suite; they are also marked by sandstone rip‐up clasts, with encrustations and borings on all sides. These surfaces are interpreted as composite discontinuities, cut during a relative sea‐level fall and remodelled during the initial transgression. The overlying transgressive sandstone bodies are 3 to 7 m thick, >4 km long and about three times longer than wide; they are composed of fine‐grained sandstones with little lateral change in grain size. Cross‐stratification and/or cross‐lamination are common, typically with smaller‐scale structures and finer grain size towards the top. Large‐scale, low‐angle (5° to 8°) inclined stratification is also common, dipping at ca 30° with respect to body elongation and dominant currents. These sandstone bodies are interpreted as offshore sand ridges, probably developed under the influence of tidal currents. Intense burrowing is typical at the top of each unit, suggesting an abandonment stage. Final deactivation favoured colonization by epibenthic‐dominated communities and the formation of skeletal‐rich limestones during the latest transgressive conditions. As partial reworking of pre‐existing ridges occurred during this stage, the Mulichinco sandstone bodies are considered the remnants of transgressive offshore sand units.

show abstract

Section: Discussionsupporting

confidence: 77%

Section: Discussionmentioning

confidence: 99%

Sharp‐based marine sandstone bodies in the Mulichinco Formation (Lower Cretaceous), Neuquén Basin, Argentina: remnants of transgressive offshore sand ridges

Schwarz¹

2012

Sedimentology

View full text Add to dashboard Cite

show abstract

“…The inner WFS consists of a nearly flat, drowned and partially dissolved lithified carbonate (karst) platform covered by a thin layer of carbonate-siliciclastic sediment (Hine 1997, Brooks et al 2003b. Five Holocene facies, or sediment veneers, have been identified overlying the bedrock of the central WFS: organic-rich mud, muddy sand, shelly sand, mixed siliciclastic/carbonate, and fine quartz sand (Edwards et al 2003, Robbins et al 2008. The distribution of each sediment type is highly varied along the inner central WFS and reflects both low accumulation rates and the lack of a single dominating source, all of which come from within or along the perimeter of the catchment (Brooks et al 2003a).…”

Section: Methodsmentioning

confidence: 99%

Spatial and temporal variability of red grouper holes within Steamboat Lumps Marine Reserve, Gulf of Mexico

Wall¹,

Donahue²,

Naar³

et al. 2011

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Red grouper Epinephelus morio act as ecosystem engineers by excavating depressions (or holes) in areas of flat sandy bottom, which provide suitable habitat for themselves and numerous other species. To understand the spatial extent of the holes, which serve as spawning habitat, and determine how that habitat changes, high-resolution multibeam sonar data were collected in overlap- Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 431: 243-254, 2011 244 fisheries move offshore (Koslow et al. 2000. Thus, locating both mature fish populations and spawning habitats essential to population stability are critical considerations for fisheries management (Coleman et al. 1996, Crowder et al. 2000. To alleviate fishing pressure on grouper aggregations during spawning, 2 marine reserves covering 200 n miles 2 were established in June 2000 on the shelf break (50-120 m deep) of the northeastern Gulf of Mexi co ( Fig. 1): Madison Swanson (29°06' N to 29°17' N, 85°38' W to 85°50' W) and Steamboat Lumps (28°03' N to 28°14' N, 84°37' W to 84°48' W) Marine Reserves (Coleman et al. 2004).Two important red grouper behaviors have been documented recently in these marine reserves: (1) sediment excavation (Scanlon et al. 2005) and (2) sound production (Montie et al. 2011). In the present study, we focused on sediment excavation in Steamboat Lumps Marine Reserve and the potential for the 2-dimensional spacing of the holes to be within the known acoustic communication range of red grouper.In continental shelf areas with a sedimentary bottom, red grouper excavate large (5 to 25 m diameter) depressions (or holes) that they use as home territories (Scanlon et al. 2005). Red grouper excavate by carrying mouthfuls of sediment from within a depression to a short distance away and then depositing the sediment by flushing it through their opercles (Scanlon et al. 2005. In Steamboat Lumps Marine Reserve, holes are mainly observed to be dug and maintained by males who use this habitat as their home territory where they will spawn. Further inshore, juvenile (female) red grouper also exhibit this behavior ). Hole excavation is mainly found in areas where relief such as rock outcroppings is not present . Excavation uncovers loose rocks such as cemented carbonate nodules, which provide an important source of substrate and refuge for organisms in areas where it was not previously available (Scanlon et al. 2005). Habitat preferences based on substrate composition influence the distribution of many marine organisms, especially benthic species (Day et al. 1989. Additionally, the probability of observing other species is higher at holes where red grouper are present (active sites) compared to those where red grouper are not present (inactive sites) .Holes can be observed using high-resolution acoustic sonar (e.g. side-scan or multibeam sonar) (Scan lon et al. 2005, Allee et al. in press; Fig. 2). In addition, the swim bladder in fish, including red grouper, can be detected with sonar because acou...

show abstract

“…In Swift et al [1978] ridges that occur on European shelves were described. Sfcr were also observed on the Brazilian shelf [ Figueiredo et al , 1982], the Argentinean shelf [ Parker et al , 1982], the Canadian shelf [ Hoogendoorn and Dalrymple , 1986; Amos et al , 1996], the Belgian and central Dutch coast [ van de Meene and van Rijn , 2000], the German shelf [ Antia , 1996], the Danish shelf [ Anthony and Leth , 2002] and the West Florida shelf [ Twichell et al , 2003; Edwards et al , 2003; Harrison et al , 2003].…”

Section: Introductionmentioning

confidence: 99%

Effect of wave‐topography interactions on the formation of sand ridges on the shelf

Vis-Star¹,

Swart²,

Calvete³

2007

J. Geophys. Res.

View full text Add to dashboard Cite

[1] The role of wave-topography interactions in the formation of sand ridges on microtidal inner shelves is investigated with an idealized morphodynamic model. The latter uses the two-dimensional shallow water equations to describe a storm-driven flow on an inner shelf with an erodible bottom and a transverse slope. Both bed load and suspended load sediment transport are included. New are the incorporation of a wave module based on physical principles and a critical shear-stress for erosion. A linear stability analysis is used to study the initial growth of bed forms, by analyzing the initial growth of small perturbations evolving on an alongshore uniform basic state, which describes a storm-driven flow on a microtidal inner shelf. Model simulations show that wave-topography interactions cause the ridges to become more trapped to the coast. Both growth and migration of the ridges are controlled by suspended load transport. The physical mechanism responsible for ridge growth is related to transport by the stormdriven current of sediment that is entrained due to wave orbital motions induced by bed forms. This new mechanism even acts in absence of a transverse bottom slope. The orientation, spacing and shape of the modeled ridges agree well with field observations from different shelves.

show abstract

Stratigraphic framework of sediment-starved sand ridges on a mixed siliciclastic/carbonate inner shelf; west-central Florida

Cited by 28 publications

References 26 publications

Sharp‐based marine sandstone bodies in the Mulichinco Formation (Lower Cretaceous), Neuquén Basin, Argentina: remnants of transgressive offshore sand ridges

Sharp‐based marine sandstone bodies in the Mulichinco Formation (Lower Cretaceous), Neuquén Basin, Argentina: remnants of transgressive offshore sand ridges

Spatial and temporal variability of red grouper holes within Steamboat Lumps Marine Reserve, Gulf of Mexico

Effect of wave‐topography interactions on the formation of sand ridges on the shelf

Contact Info

Product

Resources

About