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首页> 外文期刊>Facies >Facies development and paleoecology of rudists and corals: an example of Campanian transgressive sediments from northern Croatia, northeastern Slovenia, and northwestern Bosnia
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Facies development and paleoecology of rudists and corals: an example of Campanian transgressive sediments from northern Croatia, northeastern Slovenia, and northwestern Bosnia

机译：浅滩和珊瑚的相发育和古生态学：来自克罗地亚北部，斯洛文尼亚东北部和波斯尼亚西北部的坎帕尼亚海侵性沉积物的例子

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摘要

At six localities in northern Croatia (Donje Oresje, Gornje Oresje), Slovenia (Stranice, Slovenj Gradec), and Bosnia (Bespelj and Kober), successions of shallow-water Campanian deposits transgressively covered a tectonically uplifted and eroded paleorelief. They constitute different lateral parts of a transgressive subtidal environment, where rudists and corals are typical macrofossils. At the investigated localities, two types of succession were distinguished: (a) clastic and (b) carbonate. Most localities are within the extended chronostratigraphic range of Calveziconus cf. lecalvezae (80.5-79.03 Ma), which comprises the upper part of the Vaccinites alpinus interval zone (for Stranice and Slovenj Gradec localities) and beginning of the Pironaea polystyla interval zone (for Bespelj and Kober localities). In clastic successions, corals are the most abundant macrofossils, whereas rudists predominate within carbonate sections. The depositional setting of the investigated localities results from rapid relative sea-level rise with a tectonic overprint, which covered different types of paleorelief. In cases when the paleorelief is gentle, a transgressive succession starts with clastic coral-rich sediments or carbonates with radiolitids. In areas of steeper paleorelief carbonate sediments were deposited with a mixed radiolitid-hippuritid community, and the rudists, as the major macrofossils, indicate higher sedimentation rates in comparison with the clastic situations.
机译：在克罗地亚北部的六个地方（Donje Oresje，Gornje Oresje），斯洛文尼亚（Stranice，Slovenj Gradec）和波斯尼亚（Bespelj和Kober），一系列浅水坎帕尼亚沉积物海侵性地覆盖了构造抬升和侵蚀的古生物。它们构成了海底潮汐环境的不同侧面部分，其中，鲁德斯和珊瑚是典型的大型化石。在所调查的地区，区分了两种类型的演替：（a）碎屑岩和（b）碳酸盐岩。大多数地区都在Calveziconus cf的扩展年代地层范围内。 lecalvezae（80.5-79.03 Ma），由Vaccinites alpinus间隔带的上部（对于Stranice和Slovenj Gradec区域）和Pironaea polystyla间隔带的开始（对于Bespelj和Kober区域）组成。在碎屑演替中，珊瑚是最丰富的大型化石，而碳酸盐岩段中则以红树林为主。被调查地点的沉积环境是由于相对快速的海平面上升和构造叠印所致，覆盖了不同类型的古生物。如果古植被平缓，则海侵演替始于碎屑丰富的珊瑚沉积物或碳酸盐和放射性核素。在较陡峭的古有机碳酸盐沉积物中，沉积了混合的放射性卵-马兜铃虫群落，与主要碎屑化石相比，作为碎屑化石的主要粗隆化土体则显示出较高的沉积速率。

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