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首页> 外文期刊>Facies >Microencrusters from the Upper Jurassic-Lower Cretaceous Inalti Formation (Central Pontides, Turkey): remarks on the development of reefal/peri-reefal facies
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Microencrusters from the Upper Jurassic-Lower Cretaceous Inalti Formation (Central Pontides, Turkey): remarks on the development of reefal/peri-reefal facies

机译：上侏罗统-下白垩统Inalti组的微壳（土耳其中部庞德特斯）：关于礁/礁周围礁发育的评论

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A detailed taxonomical study was carried out for the identification of encrusting micro- organisms. Among these microencrusters, Perturbatacrusta leini, Iberopora bodeuri, Calcistella jachenhausenensis, and Pseudorothpletzella schmidi have been taxonomically revealed for the first time in Turkey. Within the biostratigraphic frame of the I. nalti Formation consisting of Mesoendothyra izjumiana zone ( Kimmeridgian), Calcistella jachenhausenensis zone ( Lower Tithonian- Upper Tithonian) and Protopeneroplis ultragranulata zone ( Upper Tithonian- Berriasian), carbonate sedimentation occurred in five depositional environments comprising slope, fore- reef, reef, back- reef and lagoonal environments. The majority of the reefal deposits of the I. nalti carbonates can be classified as coral- microbial- microencruster boundstones, which frequently occur in association with back- reef and fore- reef deposits within the Kimmeridgian- Berriasian interval. A shallowing and a subsequent deepening of water depth in the Berriasian have been revealed by the examination of stacking patterns and vertical evolution of the microfacies. Based on the observed microfacies and general features of micro- encrusting organisms, it is concluded that I. nalti carbonates share many similarities with the reefal carbonate deposits of Intra- Tethyan domain in terms of microfacies types and microencruster content.
机译：进行了详细的分类学研究，以鉴定包壳微生物。在这些微壳中，在土耳其首次从分类学上揭示了Perturbatacrusta leini，Iberopora bodeuri，Calcistella jachenhausenensis和Pseudorothpletzella schmidi。在I. nalti组的生物地层框架中，由Mesoendothyra izjumiana带（Kimmeridgian），Calcistella jachenhausenensis带（Tithonian-上部Tithonian）和Protopeneroplis ultragranulata带（Tithonian-Berriasian）组成，碳酸盐沉积发生在包括斜坡的五个沉积环境中，前礁，礁，后礁和泻湖环境。纳尔特碳酸盐岩的大部分礁沉积物可以归类为珊瑚-微生物-微壳结石，它们经常与基米第纪-贝里亚斯区间内的底礁和前礁沉积物有关。通过检查微相的堆积模式和垂直演化，揭示了贝里亚斯水深的浅化和随后的加深。根据观察到的微壳生物的微相和一般特征，可以得出结论：纳尔塔碳酸盐岩在微相类型和微壳含量方面与特提斯域内的珊瑚礁碳酸盐矿床有许多相似之处。

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