Nature and biological composition of the New Caledonian outer barrier reef slopes

Flamand, Benoit Mathot; Cabioch, Guy; Payri, Claude; Pelletier, Bernard

doi:10.1016/j.margeo.2007.12.002

Cited by 23 publications

(16 citation statements)

References 55 publications

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“…The coralline algal associations mainly include mastophorid forms that are characteristic of high-energy, near-surface zones throughout the tropics (Adey, 1986;Aguirre, 1997, 2004). Today, in New Caledonia, the mastophoroid Hydrolithon reinboldii and Lithoporella melobesoides generally occur at the shallowest parts (less than 40 m deep) of foreslopes (Flamand, 2006;Flamand et al, 2008), on reef flats, and lagoonal reef patches as well (Cabioch et al, 1999b;Payri and Cabioch, 2004). Arborescent foraminifera (Acervulina sp.…”

Section: Identification Of Depositional Environmentsmentioning

confidence: 99%

Revisiting the Quaternary development history of the western New Caledonian shelf system: From ramp to barrier reef

Montaggioni¹,

Cabioch

Thouveny

et al. 2011

Marine Geology

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Section: Identification Of Depositional Environmentsmentioning

confidence: 99%

Revisiting the Quaternary development history of the western New Caledonian shelf system: From ramp to barrier reef

Montaggioni¹,

Cabioch

Thouveny

et al. 2011

Marine Geology

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“…Here, the coralline algal crust thalli are thicker (up to 2 mm) at the base of the red algal crusts, and become thinner (to up to 50 m) and more contorted towards the top of the crusts. Hydrolithon of the subfamily Mastophoroideae characterizes the euphotic zone with water depths <10 m and is abundant in reef crests and uppermost reef slopes exposed to strong wave action; it also occurs on forereef slopes at more than 30 m water depth (Adey 1986;Bosence 1983;Aguirre et al 2000;Flamand et al 2008). Here, however, the thick Hydrolithon thalli indicate that the water depth at the base of the succession was very shallow.…”

Section: Light Microscopic Observationsmentioning

confidence: 99%

“…Here, however, the thick Hydrolithon thalli indicate that the water depth at the base of the succession was very shallow. A deepening trend is indicated by the shift in associations to Lithoporella (co-occurrence with corals in mesophotic environments) and Lithothamnion and Mesophyllum (subfamily Melobesioideae, abundant in forereef environments indicating euphotic to oligophotic conditions; Adey 1986; Bosence 1983; Aguirre et al 2000;Flamand et al 2008;Fig. 7).…”

Section: Light Microscopic Observationsmentioning

confidence: 99%

“…Interlayering of microbialites and red algae has only been observed in laminated microbialites, not in dendritic ones. The absence of thick encrusting foraminifer crusts on the microbial crusts also points to photic conditions, because with decreasing light intensity, foraminiferal crusts tend to progressively replace coralline algal crusts (Flamand et al 2008). The absence of sedimentation breaks and the development of microbialites in the coralgal environment appears enigmatic if meso-to eutrophic conditions are a prerequisite of microbialite formation.…”

Section: Growth Rates Of Microbial Crustsmentioning

confidence: 99%

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Genesis of microbialites as contemporaneous framework components of deglacial coral reefs, Tahiti (IODP 310)

Westphal

Heindel

Brandano

et al. 2009

Facies

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Deglacial reefs from Tahiti (IODP 310) feature a co-occurrence of zooxanthellate corals with microbialites that compose up to 80 vol% of the reef framework. The notion that microbialites tend to form in more nutrient-rich environments has previously led to the concept that such encrustations are considerably younger than the coral framework, and that they have formed in deeper storeys of the reef edifice, or that they represent severe disturbances of the reef ecosystem. As indicated by their repetitive interbedding with coralline red algae, the microbialites of this reef succession of Tahiti, however, formed immediately after coral growth under photic conditions. Clearly, the deglacial reef microbialites present in the IODP 310 cores did not follow disturbances such as drowning or suffocation by terrestrial material, and are not "disaster forms". Given that the corals and the microbialites developed in close spatial proximity, highly elevated nutrient levels caused by fluvial or groundwater transport from the volcanic hinterland are an unlikely cause for the exceptionally voluminous development of microbialites. That voluminous deglacial reef microbialites generally are restricted to volcanic islands, however, implies that moderately, and possibly episodically elevated nutrient levels favored this type of microbialite formation

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“…A shallow-marine origin of the studied rhodoliths is indicated also by the occurrence of subordinate mastophoroids (with three genera), which tend to predominate in shallow-water settings of modern tropical (e.g., Borowitzka and Larkum 1986; Braga and Aguirre 2004;Flamand et al 2008) and temperate seas (e.g., Aguirre et al 2000;Lund et al 2000;Braga and Aguirre 2001). Fossil examples of shallow-water rhodolith deposits characterized by sporolithaceans, melobesioids, and mastophoroids have been described from the Upper Eocene and Oligocene of the western Tethys (e.g., Bassi 1998Bassi , 2005Nebelsick et al , 2005Rasser 2000;Rasser and Nebelsick 2003;Rasser and Piller 2004;Brandano et al 2009;Bassi and Nebelsick 2010).…”

Section: Paleoecology Of Rhodolithsmentioning

confidence: 93%

Origin and resedimentation of rhodoliths in the Late Paleocene flysch of the Polish Outer Carpathians

Leszczyński

Kołodziej

Bassi

et al. 2012

Facies

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This study analyses the rhodolith-bearing deposits in the largest and most rhodolith-rich outcrop of the Polish Outer Carpathian flysch, located in the Silesian Nappe, at the village of Melsztyn. The rhodoliths and sparse associated biota occur as resedimented components in a deep-marine succession of siliciclastic conglomerates and coarse-grained sandstones, deposited by high-density turbidity currents and debris flows. The sediment was derived from a fan-delta system located at the southern margin of the Silesian flysch basin. Stratigraphic data indicate that the succession represents the Upper Istebna Sandstone deposited during the Late Paleocene. The rhodoliths are composed mostly of coralline red algae with seven genera and eight species representing the family Sporolithaceae and the subfamilies Mastophoroideae and Melobesioideae. Rhodoliths show sub-spheroidal and subellipsoidal shapes with encrusting, warty and lumpy growth forms. Lumpy growth forms show massive inner arrangements, whereas the encrusting growth forms are usually made of thin thalli and show more loosely packed inner arrangements. The rhodoliths grew on a moderately mobile siliciclastic substrate in a shallow-marine environment with a low net sedimentation rate. It is inferred that the growth of rhodoliths was favored during a relative sea-level rise. During the subsequent sea-level fall, the rhodoliths and associated siliciclastic deposits were resedimented by gravity flows into the deep-sea setting. The analyzed deposits, like other Paleocene-Eocene deposits of the Polish Outer Carpathians, provide no evidence of coeval widespread shallow-marine carbonate sedimentation along the margins of the Outer Carpathian flysch basins.

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Nature and biological composition of the New Caledonian outer barrier reef slopes

Cited by 23 publications

References 55 publications

Revisiting the Quaternary development history of the western New Caledonian shelf system: From ramp to barrier reef

Revisiting the Quaternary development history of the western New Caledonian shelf system: From ramp to barrier reef

Genesis of microbialites as contemporaneous framework components of deglacial coral reefs, Tahiti (IODP 310)

Origin and resedimentation of rhodoliths in the Late Paleocene flysch of the Polish Outer Carpathians

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