Sequence of structures in fine-grained turbidites: Comparison of recent deep-sea and ancient flysch sediments

Stow, Dorrik; Shanmugam, G.

doi:10.1016/0037-0738(80)90052-4

Cited by 376 publications

(244 citation statements)

References 14 publications

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“…Many of these start with Bouma C or D structural divisions (Bouma, 1962). There are also pure mudstone and very thin-bedded siltstone turbidites with structures similar to those described by Stow and Shanmugam (1980). On average, there are about 20 recognizable turbidite units per meter of core, the rest being bioturbated mudstone (part turbidite, part pelagite).…”

Section: Lobes and Channelssupporting

confidence: 60%

Cretaceous to Recent Submarine Fans in the Southeast Angola Basin

Stow¹

1984

Initial Reports of the Deep Sea Drilling Project

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There have been three periods in the past 100 m.y. during which sedimentation at Site 530 in the S.E. Angola Basin has been dominated by mass gravity processes. These three successions, each between 200 m and 300 m thick, can be interpreted as deep-sea fan accumulations on the basis of their morphology, seismic stratigraphy, and facies sequences and have been informally named the "brown," "white," and "green" fans from the colors of their dominant sediments. They are composed dominantly of pelagic, carbonate, and volcanogenic turbidites, respectively, all derived primarily from the Walvis Ridge immediately to the south. The average rate of sedimentation for each of the brown and green fans was 2-3 cm/1000 yr., but the frequency of (sandy) turbidites on the green fan (1/ 2,500 yr.) was an order of magnitude higher than for the (muddy) brown fan (1/25,000 yr.). Surprisingly, the brown fan sediments are more proximal than those of either the green or white fans. The primary controls on sedimentation in each case were different and included tectonic activity, paleogeography, sediment type, oceanic circulation, and sediment instability.

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Section: Lobes and Channelssupporting

confidence: 60%

Cretaceous to Recent Submarine Fans in the Southeast Angola Basin

Stow¹

1984

Initial Reports of the Deep Sea Drilling Project

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“…Thus, the or i gin of the coarse-grained laminae can be linked with storms and tides. Both can gen er ate low-den sity sus pen sion cur rents, which produce se quences of struc tures sim i lar to those re ported from fine-grained turbidites (e.g., Stow and Shanmugam, 1980;Hill, 1984;Stow and Piper, 1984;Pedersen, 1985;Myrow, 1992) and ob served also in the de pos its stud ied. If de liv ery of fine-grained sed i ment to the nearshore zone is high, storms and tides can also gen er ate wave-and cur rent-sup ported density flows, which carry sus pended sed i ment in the form of fluid mud layer (Wright and Friedrichs, 2006).…”

Section: Discussion Sedimentary Environmentmentioning

confidence: 99%

Storm-influenced deposition and cyclicity in a shallow-marine mudstone succession - example from the Middle Jurassic ore-bearing clays of the Polish Jura (southern Poland)

Leonowicz

2015

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1 Uni ver sity of War saw, In sti tute of Ge ol ogy, ¯wirki i Wigury 93, 02-089 Warszawa, Po land Leonowicz, P., 2015. Storm-in flu enced de po si tion and cyclicity in a shal low-ma rine mudstone suc ces sion -ex am ple from the Mid dle Ju ras sic ore-bear ing clays of the Pol ish Jura (south ern Po land). Geo log i cal Quar terly, 59 (2): 325-344, doi: 10.7306/gq.1221Sedimentological anal y sis of bioturbated mudstones from the Mid dle Ju ras sic ore-bear ing Czêstochowa Clay For ma tion has re vealed com mon rel ics of sed i men tary struc tures, such as thin silt/sand laminae, bed ding-plane ac cu mu la tions of shell debris, small and me dium silt-sand lenses, as well as silt-, sand-and shell-de bris-rich lev els, ac com pa nied by ero sion sur faces and mi nor scours. These fea tures doc u ment pe ri od i cal high-en ergy con di tions of mud de po si tion, in clud ing storm stir ring, event sed i men ta tion and the ac tiv ity of storm-gen er ated bot tom cur rents, which were re spon si ble for sea-floor ero sion and sed i ment sup ply from shal lower parts of the ba sin. The sea bot tom was prev a lently be low the storm wave base, but it rose above it dur ing ex cep tion ally strong storms and in the Early Bathonian zig zag chron when the ba sin ex pe ri enced con sid erable shallowing. The shal low est and high est en ergy con di tions oc curred in the late macrescens subchron, when the bot tom was close to, or above the fair-weather wave base. The es ti mated depth of the sea did not ex ceed sev eral tens of metres, but in some pe ri ods it could be even less than 20 m. Based on the ver ti cal vari a tion of the sand, silt and clay con tents, seven transgressive-re gres sive cy cles have been dis tin guished in the ap prox i mately 75 m thick suc ces sion span ning the Up per Bajocian-Up per Bathonian. Cy cles TR 1 , TR 2+3 , TR 5 and TR 6+7 cor re late with those dis tin guished in the co eval suc ces sion from cen tral Po land, al though the strati graphic po si tion of cy cle bound aries is slightly shifted. These cy cles re cord rel a tive sea level changes that af fected the en tire Pol ish Ba sin. Re gres sions R 2 and R 6 were smaller-scale-events, gen er ated in response to a lo cal tec tonic ac tiv ity and autocyclic shore line progradation.

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“…4D and E). Type 1 deposits are dominant in the upper 6 361 m of the core, while type 2 are dominant in the lower 4 m. We interpret these deposits to be the 362 result of turbidity currents in the sense of Stow and Shanmugam (1980). Within the core there are 363 lighter, pale grey units that are rich in foraminiferal sand, have a pitted surface, and show evidence 364 of bioturbation.…”

mentioning

confidence: 89%

Different frequencies and triggers of canyon filling and flushing events in Nazaré Canyon, offshore Portugal

et al. 2016

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8Submarine canyons are one of the most important pathways for sediment transport into ocean 9 basins. For this reason, understanding canyon architecture and sedimentary processes has 10 importance for sediment budgets, carbon cycling, and geohazard assessment. Despite increasing 11 knowledge of turbidity current triggers, the down-canyon variability in turbidity current frequency 12 within most canyon systems is not well constrained. New AMS radiocarbon chronologies from 13 canyon sediment cores illustrate significant variability in turbidity current frequency within Nazaré 14 Canyon through time. Generalised linear models and Cox proportional hazards models indicate a 15 strong influence of global sea level on the frequency of turbidity currents within the canyon. 16Radiocarbon chronologies from basin sediment cores indicate that larger, canyon-flushing turbidity 17 currents reaching the Iberian Abyssal Plain have a significantly longer average recurrence interval 18 than turbidity currents that fill the canyon. The recurrence intervals of these larger turbidity currents 19 also appear to be unaffected by long-term changes in global sea level. This indicates that the factors 20 triggering, and thus controlling, the frequency of canyon-flushing and canyon-filling events are very 21 different. Canyon-filling appears to be predominantly controlled by sediment instability during sea 22 level lowstand and by storm and nepheloid transport during the present day highstand. Canyon-23 flushing exhibits time-independent behaviour. This indicates that a temporally random process, or 24 summation of non-random processes that cannot be discerned from a random signal, are triggering 25 canyon flushing events. 26

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Sequence of structures in fine-grained turbidites: Comparison of recent deep-sea and ancient flysch sediments

Cited by 376 publications

References 14 publications

Cretaceous to Recent Submarine Fans in the Southeast Angola Basin

Cretaceous to Recent Submarine Fans in the Southeast Angola Basin

Storm-influenced deposition and cyclicity in a shallow-marine mudstone succession - example from the Middle Jurassic ore-bearing clays of the Polish Jura (southern Poland)

Different frequencies and triggers of canyon filling and flushing events in Nazaré Canyon, offshore Portugal

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