Biogenic Sedimentary Structures (Trace Fossils) in Leg 15 Cores

Warme, John E.; Kennedy, William J.; Schneidermann, Nahum

doi:10.2973/dsdp.proc.15.123.1973

Cited by 16 publications

(16 citation statements)

References 9 publications

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“…The basement ridges, because they stood topographically high, are generally marked by thin sedimentary columns punctuated major unconformities, a lack of the turbidite sequences, and abundant biogenic sediments. Thus, only at Site 345 in the Lofoten Basin is there a fairly complete and continuous Warme et al, 1973, fig. ICfrom Hantzschel, 1962.…”

Section: Summary Of Sedimentary Historymentioning

confidence: 99%

“…The reworked sediments of the older or larger burrows are probably richer in nutrients, better oxygenated, and more easily perforated by the burrowing animal (Warme et al, 1973). Ekdale (1974) concluded that Chondrites is the deepest trace fossil in the deep-sea assemblage, that the Chondrites-^voáMcmg organism commonly burrowed as deeply as 20 cm below the sediment surface, and that Chondrites is more characteristic of biologic oozes than terrigenous sediments.…”

Section: Chondritesmentioning

confidence: 99%

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Turbidites, Redbeds, Sedimentary Structures, and Trace Fossils Observed in DSDP Leg 38 Cores and the Sedimentary History of the Norwegian-Greendland Sea

Nilsen¹

1978

Initial Reports of the Deep Sea Drilling Project

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The sedimentary history of the Norwegian-Greenland Sea is typical of rifted-margin ocean basins; it is marked by stratigraphic sequences that (1) were deposited in deeper water through time, as oceanic crust subsided away from the active spreading ridge, and (2) become finer grained and more biogenic through time, as the continental source areas moved farther away from the active spreading ridge during widening of the ocean basin. Nonmarine redbeds above subaerially weathered basalt form the base of the oldest sequences, formed when rifting of the single continent began. Turbidites were subsequently deposited as the rift widened, deepened, and became oceanic. Hemipelagic mudstones were deposited with further widening, and then biogenic calcareous and siliceous oozes were deposited as the influence of the distant continental margins on sedimentation diminished. Finally, ice-rafted glacial deposits blanketed the entire sea floor and all older deposits; the glacial deposits directly overlie newly created Plio-Pleistocene ocean floor near the active spreading ridge. A great variety of sedimentary structures, trace fossils, and related features are found within these stratigraphic sequences, which are complicated by the irregular tectonic history of the Norwegian-Greenland Sea.

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Section: Summary Of Sedimentary Historymentioning

confidence: 99%

Section: Chondritesmentioning

confidence: 99%

Turbidites, Redbeds, Sedimentary Structures, and Trace Fossils Observed in DSDP Leg 38 Cores and the Sedimentary History of the Norwegian-Greendland Sea

Nilsen¹

1978

Initial Reports of the Deep Sea Drilling Project

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“…As in many previous studies on deep-sea trace fossils from DSDP cores, diversity is low (Warme et al, 1973 van der Lingen, 1973;Nilsen and Kerr, 1979;Ekdale, 1974Ekdale, , 1978Ekdale, , 1980Chamberlain, 1975). Most traces belong to the ichnogenera Plαnolites, Zoophycos, and Chondrites and a smaller number to Teichichnus.…”

Section: Trace Fossilsmentioning

confidence: 93%

Bioturbation and Trace Fossils in Deep Sea Sediments of the Walvis Ridge, Southeastern Atlantic, Leg 74

Fütterer¹

1984

Initial Reports of the Deep Sea Drilling Project

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Trace fossil distribution present in pelagic carbonates cored on the Walvis Ridge during Deep Sea Drilling Project Leg 74 are described. A characteristic deep-sea trace fossil assemblage comprising the cosmopolitan ichnogenera Planolites, Chondrites, Zoophycos, and Teichichnus was found at paleo-water-depths ranging from a few hundred to about 4500 m. Paleodepth distribution indicates that Zoophycos has changed its environmental preference from relatively shallow water in the Cretaceous into deeper water in the late Paleocene. Thus Zoophycos can be used as a paleodepth indicator in the bathyal environment if its stratigraphic age is known.

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“…Structures related to burrow mottling (Reineck and Singh, 1973;Warme et al, 1973) are very widespread throughout most of the facies at all three sites. Living animals within modern sediments are mostly limited in their activity to less than 30 cm from the sediment surface (Figures 5, 6, and 8).…”

Section: Bioturbationmentioning

confidence: 99%

Sedimentary Features of Cape Basin and Angola Basin Sediments, DSDP Leg 40

Kagami¹

1978

Initial Reports of the Deep Sea Drilling Project

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Biogenic Sedimentary Structures (Trace Fossils) in Leg 15 Cores

Cited by 16 publications

References 9 publications

Turbidites, Redbeds, Sedimentary Structures, and Trace Fossils Observed in DSDP Leg 38 Cores and the Sedimentary History of the Norwegian-Greendland Sea

Turbidites, Redbeds, Sedimentary Structures, and Trace Fossils Observed in DSDP Leg 38 Cores and the Sedimentary History of the Norwegian-Greendland Sea

Bioturbation and Trace Fossils in Deep Sea Sediments of the Walvis Ridge, Southeastern Atlantic, Leg 74

Sedimentary Features of Cape Basin and Angola Basin Sediments, DSDP Leg 40

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