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Vola Gabriele Sarandrea Luca Della Porta Giovanna Cavallo Alessandro Jadoul Flavio Cruciani Giuseppe 《Mineralogy and Petrology》2018,112(4):555-576
Mineralogy and Petrology - This study evaluates the influence of chemical, mineralogical and petrographic features of the Neoarchean limestone from the Ouplaas Mine (Griqualand West, South Africa)... 相似文献
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Microbial–serpulid communities are the main reef-builders of most Norian–Rhaetian carbonate platforms of Italy. They represent minor, yet significant communities in the shallow western Tethys, in contrast with the highly diversified sponge- and coral-dominated Dachstein reefs widespread from Eastern Alps to Australia. The microbial–serpulid build-ups are systematically associated with narrow intraplatform troughs and developed on the outer margin–upper slope area under marine conditions unsuitable for the development of coralgal reefs. The development of these settings can be related to transtensional tectonics affecting an elongate belt which was roughly parallel to the Piedmont–Ligurian Ocean spreading axis during the Jurassic. Dysoxic and mesosaline waters are the main cause of the success of the Norian microbial–serpulid build-ups; whereas, from the late Norian to the Rhaetian, eutrophication and climate change control their distribution. These environments acted during Norian–Rhaetian times as refuges, where opportunitistic organisms could survive and build frameworks during a period otherwise dominated by coralgal reefs. 相似文献
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