Origin and Geomorphic Characteristics of Ocean Basins

Harris, Peter T.; Macmillan-Lawler, Miles

doi:10.1007/978-3-319-57852-1_8

Cited by 3 publications

(4 citation statements)

References 26 publications

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“…Canyons and gullies are a critical link between coastal and shelf waters and abyssal depths, and they are responsible for transferring sediments, nutrients, and even litter and pollutants into deep-water settings [1][2][3][4]. The formation of the Dohrn canyon in Naples Bay is genetically related to the main eruptive events involving its submarine portion, including the Campanian Ignimbrite (CI; 37 ky B.P.)…”

Section: Introductionmentioning

confidence: 99%

“…The global canyon database of Harris et al [2] is based on 9477 submarine canyons, using as input variables the length, the width, the mean canyon depth, the canyon depth range or delta depth, the canyon spacing, and the occurrence of shelf-incising canyons [3]. In the Mediterranean area, the canyon geomorphology is strongly controlled by the class 4, characterized by a small area, by a short length, by a narrow width, and by a close spacing between the canyons [1].…”

Section: Introductionmentioning

confidence: 99%

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The Coastal Areas of the Bay of Naples: The Sedimentary Dynamics and Geological Evolution of the Naples Canyons

Aiello

Caccavale

2023

Geosciences

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The sedimentary dynamics and geological evolution of the Naples canyons during the Late Quaternary have been studied based on sedimentological and seismo-stratigraphic data. Several factors, including the sedimentary environments, tectonic setting, and volcanic eruptions, have controlled the geological evolution of the coastal and marine areas of the Bay of Naples. The main data and methods include the sedimentological data analysis, the seismo-stratigraphic techniques applied in the geological interpretation of seismic profiles, and the integrated analysis of core data that were previously published. The formation of the Dohrn canyon is controlled by fluvial processes, active in correspondence with the palaeo-Schiazzano River system and by the main eruptive events involving the submarine portion of Naples Bay, including the Campanian Ignimbrite (CI; 39 ky B.P.) and the Neapolitan Yellow Tuff (NYT; 15 ky B.P.). The formation of the Magnaghi canyon is controlled by erosional processes on the continental slope of Procida Island, which was active during the last eruptive phases of the island (Solchiaro Formation; 18 ky B.P.), triggering high rates of volcaniclastic supply.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Coastal Areas of the Bay of Naples: The Sedimentary Dynamics and Geological Evolution of the Naples Canyons

Aiello

Caccavale

2023

Geosciences

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“…As plataformas continentais guardam registros sedimentares e morfológicos da variação do nível relativo do mar (NRM) (Leeder, 1982;Harris & Macmillan-Lawler, 2018). Essas variações são desencadeadas principalmente por fatores tectônicos (tectonoeustasia) ou climáticos, como aqueles relacionados aos Ciclos Orbitais (Ciclos de Milankovitch) que por sua vez são atrelados às eras glaciais e interglaciais (glacioeustasia) ou ainda à situações locais ligadas ao suprimento sedimentar (Mörner, 1976;Berger, 1978;1992;Catuneanu, 2002;Silva, 2007;Paillard, 2013;2015).…”

Section: Introductionunclassified

Sedimentos Relíquias, Palimpsestos e as alusões Paleoambientais e Eustáticas

Filho

Quaresma²,

Bastos³

et al. 2023

PESQUI GEOCIENC

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A costa brasileira é caracterizada por ampla diversidade geológica e geomorfológica, contando com diversos sistemas deltaicos e estuarinos. Nesse contexto, em termos de suprimento e dinâmica sedimentar, destaca-se o delta do rio Doce, situado na região norte do estado do Espírito Santo, onde está localizada a área de estudo. Ligados a essa diversidade sedimentológica e às variações eustáticas ocorridas nos últimos milhares de anos, alguns depósitos apresentam registros que destoam do que se deveria obter a partir do atual regime hidrodinâmico, apresentando granulometrias e texturas diferenciadas, sendo classificados em alguns trabalhos como sedimentos relíquias. Assim, visando identificar esses sedimentos reliquiares, o presente trabalho avaliou as principais características morfológicas e texturais dos sedimentos da área, utilizando técnicas e critérios aplicados com a lupa binocular e microscópio eletrônico de varredura (MEV). A partir das análises, sobretudo do grau de arredondamento e feições texturais, foi possível identificar os sedimentos relíquias e verificar a localização geográfica destes depósitos, interpretando se tratar de um paleossistema fluvial do Doce, com características altamente energéticas à época e suas implicações sobretudo eustáticas para a região norte do estado.

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“…Kukowski et al 2008), which have their shallowest closed bathymetric contour at 3600 m water depth. These basins are open at sills and trenches where bottom water flow connects to the surrounding basins (Lonsdale, 1976;Harris et al 2014;Harris & Macmillan-Lawler, 2018). The Nazca Ridge is a bathymetric high marked by numerous seamounts with an elongated and rough morphology (Harris et al 2014;Casalbore, 2018).…”

Section: Introductionmentioning

confidence: 99%

The Nazca Drift System – palaeoceanographic significance of a giant sleeping on the SE Pacific Ocean floor

et al. 2021

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The evolution and resulting morphology of a contourite drift system in the SE Pacific oceanic basin is investigated in detail using seismic imaging and an age-calibrated borehole section. The Nazca Drift System covers an area of 204 500 km2 and stands above the abyssal basins of Peru and Chile. The drift is spread along the Nazca Ridge in water depths between 2090 and 5330 m. The Nazca Drift System was drilled at Ocean Drilling Program Site 1237. This deep-water drift overlies faulted oceanic crust and onlaps associated volcanic highs. Its thickness ranges from 104 to 375 m. The seismic sheet facies observed are associated with bottom current processes. The main lithologies are pelagic carbonates reflecting the distal position relative to South America and water depth above the carbonate compensation depth during Oligocene time. The Nazca Drift System developed under the influence of bottom currents sourced from the Circumpolar Deep Water and Pacific Central Water, and is the largest yet identified abyssal drift system of the Pacific Ocean, ranking third in all abyssal contourite drift systems globally. Subduction since late Miocene time and the excess of sediments and water associated with the Nazca Drift System may have contributed to the Andean orogeny and associated metallogenesis. The Nazca Drift System records the evolution in interactions between deep-sea currents and the eastward motion of the Nazca Plate through erosive surfaces and sediment remobilization.

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Origin and Geomorphic Characteristics of Ocean Basins

Cited by 3 publications

References 26 publications

The Coastal Areas of the Bay of Naples: The Sedimentary Dynamics and Geological Evolution of the Naples Canyons

The Coastal Areas of the Bay of Naples: The Sedimentary Dynamics and Geological Evolution of the Naples Canyons

Sedimentos Relíquias, Palimpsestos e as alusões Paleoambientais e Eustáticas

The Nazca Drift System – palaeoceanographic significance of a giant sleeping on the SE Pacific Ocean floor

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