Eustatic control of turbidites and winnowed turbidites

Shanmugam, G.; Moiola, R. J.

doi:10.1130/0091-7613(1982)10<231:ecotaw>2.0.co;2

Cited by 139 publications

(50 citation statements)

References 40 publications

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“…This fits the well-known fact that turbidite frequency is related to relative changes of sea level (e.g., Shanmugam and Moiola, 1981). For siliciclastic, fine-grained deposits seaward of deltas, this phenomenon can be explained as follows: During high sea level the major proportion of river-transported material is trapped on the shelf, and mass movement processes down to the deep sea are not very frequent.…”

Section: Implications Of Sea Level Fluctuationsmentioning

confidence: 58%

Accumulation Rates of Mississippi Fan Sediments Cored during Deep Sea Drilling Project Leg 96

Wetzel¹,

Kohl²

1986

Initial Reports of the Deep Sea Drilling Project

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Sediment accumulation rates (g/cm 2 I0 3 yr.) were calculated for undisturbed cores from the Mississippi Fan drill sites. These values take into account the effect of compaction, thus allowing an exact comparison between all sites and stratigraphic zones.In the uppermost stratigraphic Zone Z of Ericson and Wollin, sediment accumulation is comparable to that found in hemipelagic sequences (1-10 g/cm 2 I0 3 yr.). In Zone Y (late Wisconsin glacial), which spans a period of fluctuating sea level, the accumulation rates are one to three orders of magnitude greater than in Zone Z, using seismic 3 yr.), but this value is influenced by debris flow deposits occurring in Zone X.

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Section: Implications Of Sea Level Fluctuationsmentioning

confidence: 58%

Accumulation Rates of Mississippi Fan Sediments Cored during Deep Sea Drilling Project Leg 96

Wetzel¹,

Kohl²

1986

Initial Reports of the Deep Sea Drilling Project

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“…This time interval correlates with a postulated worldwide low stand of sea level (Vail and others, 1977;Vail and Hardenbol, 1979). During low stands of sea level, deposition in deep-sea fans and basins is accelerated, apparently because the low sea level permits streams to transport coarse-grained detritus across the shelf directly to the heads of submarine canyons (Vail and others, 1977;Shanmugam and Moiola, 1982). The sand-rich deepsea deposits of The Rocks Sandstone Member have all the characteristics predicted by this hypothesis.…”

Section: Regional Stratigraphic Relationsmentioning

confidence: 66%

Submarine canyon deposits, central California coast, and their possible relation to an Eocene low sea-level stand

Seiders¹,

Joyce²

1984

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“…Older Miocene formations in the area contain abundant mud, so its absence in Tokomaru Formation is presumably not a source effect. Most mud must therefore have bypassed the Tokomaru system; however, evidence of winnowing by bottom traction currents, such as clean, rippled sand tops on turbidites, to give the winnowed turbidites of Shanmugam & Moiola (1982), is lacking. Therefore, mud is inferred to have been carried basinwards, beyond the area of present Tokomaru preservation, by the tail regions of the turbidity currents.…”

Section: Depositional Mechanismsmentioning

confidence: 99%

Stratigraphy and sedimentology of Tokomaru Formation (Late Miocene — Early Pliocene), eastern Raukumara Peninsula, New Zealand

Blom

1984

New Zealand Journal of Geology and Geophysics

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Tokomaru Formation is a thick, extensive, Upper Miocene-Lower Pliocene (Kapitean-Opoitian), sheet-form, sand-dominated sequence within the East Coast Deformed Belt, Raukumara Peninsula, New Zealand. The rocks appear to be autochthonous, lying with small unconformity on mid-upper Tertiary allochthonous rocks in the east, and overstepping with large unconformity onto complex Cretaceous strata in the west. The formation is fine grained, but has at least 1 localised, basal conglomerate lens, some medium-grained calcarenites, and a tuff bed. From composite sections, the formation can be subdivided into a lower 100 m of homogeneous, thickbedded, fine-grained sandstone, followed by at least 200 m of alternating, frequency graded, very fine sandstones and coarse siltstones. The sands are largely volcanic derived, but only 1 definite tephra (rhyolitic in composition) was found. Foraminifera indicate upper to mid bathyal water depths, but transported inner shelf forms are also present. Locally abundant, mostly fragmentary macrofossils of low diversity appear to have been transported.Abundant trace fossils include Ophiomorpha, Zoophycos, Paleodictyon, Chondrites, and a simple V-shaped Tigillites-type burrow, which are consistent with an upper to mid bathyal environment. More than 1 sediment gravity-flow mechanism was responsible for sediment emplacement. The conglomerates were possibly emplaced by high-density turbulent flows with subsequent tractional reworking. The thick-bedded sandstones and alternating sequence were deposited by many turbidity currents. Deposition took place in the arc-trench gap of the Neogene New Zealand magmatic arc.

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Eustatic control of turbidites and winnowed turbidites

Cited by 139 publications

References 40 publications

Accumulation Rates of Mississippi Fan Sediments Cored during Deep Sea Drilling Project Leg 96

Accumulation Rates of Mississippi Fan Sediments Cored during Deep Sea Drilling Project Leg 96

Submarine canyon deposits, central California coast, and their possible relation to an Eocene low sea-level stand

Stratigraphy and sedimentology of Tokomaru Formation (Late Miocene — Early Pliocene), eastern Raukumara Peninsula, New Zealand

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