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32 results for “carbonate platform”
Dataset: Sea-level and monsoonal control on the Maldives carbonate platform (Indian Ocean) over the last 1.3 million years
<p>Datasets used in the article "Sea-level and monsoonal control on the Maldives carbonate platform (Indian Ocean) over the last 1.3 million years" by M. Alonso-Garcia et al. (2023)</p> <p>In this study, we used elemental geochemical compositional records, obtained by X-ray fluorescence (XRF) core-scanning, from IODP Site U1467, in the Maldives Sea (Indian Ocean), to investigate how sea-level and coupled ocean-atmosphere dynamics affected the production and export of carbonate platform sediments to the Maldives Inner Sea over the last 1.3 Ma. The Sr/Ca ratio has been interpreted as a proxy for neritic carbonate production at the Maldives platform and its export to the periplatform sediments. The record of the Sr/Ca ratio has been combined with the Br normalized record, as a proxy for organic matter content linked to pelagic primary productivity and water column mixing, and with other proxies from Site U1467 that indicate variations in the monsoon dynamics, such as the Fe/K ratio, as a proxy for summer monsoon intensity, and the Fe input for winter monsoon intensity (Kunkelova et al., 2018). The combination of all those proxies suggests that during the last 1.3 Ma changes in the carbonate production and export in the Maldives region responded to sea-level variations but also to climate fluctuations related to monsoon dynamics. Moreover, the long-term patterns observed in the records can be related to the MPT and MBE events.</p>
Data from: Early and Middle Triassic trends in diversity, evenness, and size of foraminifers on a carbonate platform in south China: Implications for tempo and mode of biotic recovery from the end-Permian mass extinction
Open the record for dataset details and reuse information.
Fig. 16 in Microfacies Analysis And Depositional Environments Of The Tithonian-Valanginian Limestones From Dâmbovicioara Gorges (Cheile Dâmbovicioarei), Getic Carbonate Platform, Romania
Fig. 16 Limestones from the Padina Brașoavei outcrop (Urdărița horst). a Limestones from the lower part of the succession [(the yellow arrows indicates the first brecciated level (with green-greyish matrix), while the red arrows indicate the second, black pebble bearing brecciated level]. b Well-bedded limestones from the upper part of the succession. c, d Fine laminated fenestral limestones from the lower part (c) and the upper part (d) of the succession. e The first brecciated level, with green-greyish matrix. f Black pebble-bearing level.
Fig. 2 Reefal facies. a-c in Microfacies Analysis And Depositional Environments Of The Tithonian-Valanginian Limestones From Dâmbovicioara Gorges (Cheile Dâmbovicioarei), Getic Carbonate Platform, Romania
Fig. 2 Reefal facies. a-c Coral-microbial boundstone; coral colonies are heavily encrusted by problematic microorganisms (a) or bordered by syndepositional, radiaxial-fibrous cements (b). d-h Bioclastic packstone (d, e, g-h) and bioclastic grainstone (f) internal sediment with dasycladalean algae [Steinmanniporella kapelensis (Sokač & Nikler)] (d), sponges (e), mollusks, corals, Crescentiella (f), microstalactitic (g) and microthrombolitic (h) microbial crusts.
Fig. 14 in Microfacies Analysis And Depositional Environments Of The Tithonian-Valanginian Limestones From Dâmbovicioara Gorges (Cheile Dâmbovicioarei), Getic Carbonate Platform, Romania
Fig. 14 Micro-cycles within supratidal carbonates. Alternations of fractured fenestral non-fossiliferous mudstone and ostracod-bearing mudstone; horizontal, oblique and vertical cracks are present within the non-fossiliferous levels (1); fractured cavities contain vadose silt; storm deposits (2) and pond type facies (ostracod-bearing mudstone) (3).
Fig. 10 Intertidal limestones. a in Microfacies Analysis And Depositional Environments Of The Tithonian-Valanginian Limestones From Dâmbovicioara Gorges (Cheile Dâmbovicioarei), Getic Carbonate Platform, Romania
Fig. 10 Intertidal limestones. a Fine laminated peloidal grainstone; well-sorted limestones with frequent ripples (1) and horizontal or small-scale oblique laminations (2). b Subaerially exposed fenestral peloidal-bioclastic grainstone with vadose microstalactitic cement (arrowed).
Fig. 18 in Microfacies Analysis And Depositional Environments Of The Tithonian-Valanginian Limestones From Dâmbovicioara Gorges (Cheile Dâmbovicioarei), Getic Carbonate Platform, Romania
Fig. 18 Main microfossils from the Cheile Dămbovicioarei Formation. a Bramkampella arabica; b Selliporella neocomiensis; c Pseudocymopolia jurassica; d Salpingoporella praturloni; e, f Haplophragmoides joukowskyi; g Montsalevia salevensis; h Scythiolina sp.; i Pseudotextulariella courtionensis; j Coscinoconus cherchiae; k Coscinoconus cf. perconigi; l Coscinoconus cf. campanellus; m Danubiella gracilima; n, o Paracoskinolina? jourdanensis; p Protopeneroplis ultragranulata; q Thaumatoporella parvovesiculifera. Scale-bar = 0.25 mm (a-c, e-q); 0.50 mm (d).
Fig. 13 Supratidal limestones. a in Microfacies Analysis And Depositional Environments Of The Tithonian-Valanginian Limestones From Dâmbovicioara Gorges (Cheile Dâmbovicioarei), Getic Carbonate Platform, Romania
Fig. 13 Supratidal limestones. a Fenestral muds with horizontal, vertical and oblique desiccation cracks. The horizontal cracks are parallel with the lamination while the upper part of the cracks is filled with vadose silt (arrow). b, c Pedogenetically modified supratidal limestones. Fractured fenestral mudstone (b, c); it contains horizontal, oblique and vertical cracks; c, detail of b; cavities are filled by micro-stalactitic and meniscus cements which from vadoid crusts (arrows 1); the lower part of the cavities contains vadose silt (arrow 2).
Fig. 1 in Microfacies Analysis And Depositional Environments Of The Tithonian-Valanginian Limestones From Dâmbovicioara Gorges (Cheile Dâmbovicioarei), Getic Carbonate Platform, Romania
Fig. 1 Location of the Cheile Dâmbovicioarei within the Dâmbovicioara Area. a Location of the Dâmbovicioara zone on the Romanian map; b Location of the sampled profile on the geological map 1:50000 (redrawn from Dimitrescu et al., 1971 and Patrulius et al., 1971).
Fig. 19 in Microfacies Analysis And Depositional Environments Of The Tithonian-Valanginian Limestones From Dâmbovicioara Gorges (Cheile Dâmbovicioarei), Getic Carbonate Platform, Romania
Fig. 19 Distribution of main microfossils from Dâmbovicioarei Gorges. Facies legend: 1, reef limestone; 2, intraclastic bioclastic rudstone/grainstone with black pebbles; 3, predominantly micritic-fenestral limestone; 4, predominantly peloidal-cyanobacterial fenestral limestone; 5, bioclastic-intraclastic rudstone and grainstone; 6, marls; F-fault.
Geometries, Driving Factors, And Connectivity Of Background Fractures At The Latemar Carbonate Platform (N. Italy): Relevance For Subsurface Reservoir Modelling_DATASETS
<p>The datasets (original field photographs and drone images) presented here are drawn from the extensive fieldwork by the author(s) at the Latemar carbonate platform in northern Italy. These datasets show different rock units in the Latemar platform riddled with diverse structural elements, including fractures (veins, joints, faults) and stylolites. In addition, the datasets are part of the paper titled "<strong>Geometries, Driving </strong><strong>F</strong><strong>actors, And Connectivity Of Background Fractures At The Latemar Carbonate Platform (N. Italy): Relevance For Subsurface Reservoir Modelling", </strong>submitted for publication in the Tectonics Journal. </p> <p>The drone images are taken with DJI Phantom 4® and processed using Agisoft PhotoScan® - a photogrammetry tool. The workflow in processing the drone images is publicly available in the published work of Bisdom et al. (2017).</p>
Fig. 6 in Microfacies Analysis And Depositional Environments Of The Tithonian-Valanginian Limestones From Dâmbovicioara Gorges (Cheile Dâmbovicioarei), Getic Carbonate Platform, Romania
Fig. 6 Peritidal limestones from the Dâmbovicioara Gorges.
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
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