2006
DOI: 10.1130/g22505.1
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Thick turbidite successions from supply-dominated shelves during sea-level highstand

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Cited by 215 publications
(189 citation statements)
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“…A key geometric element to be observed is the paleo-shelf break and its trajectory in a prograding package. The trajectory of the paleoshelf break (Steel and Olsen, 2002) is used to interpret changes in accommodation on the shelf (area located updip from the shelf break) (e.g., Johannessen and Steel, 2005;Carvajal and Steel, 2006). A sigmoid prograding package shows a parallelism of the upper stratal segments (topsets) indicating a continuous up-building (aggradation) of the topsets during progradation, and an upstepping shelf-break trajectory ( Figure 14).…”
Section: Methodsmentioning
confidence: 99%
“…A key geometric element to be observed is the paleo-shelf break and its trajectory in a prograding package. The trajectory of the paleoshelf break (Steel and Olsen, 2002) is used to interpret changes in accommodation on the shelf (area located updip from the shelf break) (e.g., Johannessen and Steel, 2005;Carvajal and Steel, 2006). A sigmoid prograding package shows a parallelism of the upper stratal segments (topsets) indicating a continuous up-building (aggradation) of the topsets during progradation, and an upstepping shelf-break trajectory ( Figure 14).…”
Section: Methodsmentioning
confidence: 99%
“…Although sand transport to the deep-sea is favored by forced regressions (e.g., Muto & Steel, 2002;Helland-Hansen & Hampson, 2009), occurrence and volume of turbidites are not exclusively controlled by base-level falls (e.g., Burgess & Hovius, 1998;Carvajal & Steel, 2006;Dixon et al, 2012;Safronova et al, 2014;Berton & Vesely, 2016). Turbidites were identified in all seismic facies associations formed during base-level falls, but they are more frequently observed on the bottomset of clinoforms from association 1, in which well-developed shelf-margin deltas/shoreface deposits occur (Figs.…”
Section: Discussionmentioning
confidence: 99%
“…Despite the lack of well control and/or 3D seismic data to reinforce the interpretation of such accumulations, sand concentration on slope areas is generally associated to channel and/or canyon filling (e.g., Carvajal & Steel, 2006). The gradual increase in foreset dip with time may be related to a progressive increase on sediment supply, as a consequence of relative sea level fall and erosion in the shelfal domain (Zecchin & Catuneanu, 2013).…”
Section: Seismic Facies Bmentioning
confidence: 99%
“…Pointsourced sandy fans may be well developed as a result of high sediment supply on the shelf during highstand, as opposed to sand/mud-rich deep sea fans which developed during falling or low sea level (Steel et al 2008). For example, the Lance- Fox Hills-Lewis shelf margin in southern Wyoming suggests that high supply was critical in causing the accretion of this moderately wide Maastrichtian shelf margin, at a minimum rate of 47.8 km/My, and the generation of large, sandrich fans during every shoreline regression across the shelf (Carvajal & Steel 2006).…”
Section: G G G G Geol Eol Eolmentioning
confidence: 99%
“…However, the turbidite sedimentation on the Mississippi Fan (Kolla & Perlmutter 1993), deep water fans in the Lance-Fox Hills-Lewis shelf margin (Carvajal & Steel 2006), and fans in the California borderland (Covault et al 2007) show that large amounts of sand can be transported to deep water even during sea level rise and highstand. Pointsourced sandy fans may be well developed as a result of high sediment supply on the shelf during highstand, as opposed to sand/mud-rich deep sea fans which developed during falling or low sea level (Steel et al 2008).…”
Section: G G G G Geol Eol Eolmentioning
confidence: 99%