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Early-Middle Triassic echinoderm remains from the Istranca Massif, Turkey

机译:三叠纪早期中层棘皮动物仍来自土耳其伊斯特拉卡断层块

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摘要

In the northwestern part of the Istranca Massif close to the Turkish-Bulgarian border, recrystallized limestones above germanotype fluvial clastics (Buntsandstein-equivalents) yielded remains of echinoderms and bivalves. The limestones are lensoidal, flaser-bedded and bioturbated, like the Holocrinus lagerstatten, which are common in the germanotype Muschelkalk. The sufficiently preserved crinoid ossicles can be assigned to genus Holocrinus, a crinoid clade that occurs worldwide in Early and Middle Triassic sediments. This is so far the first Triassic fossil data from the Istranca Massif and provides evidence for the correlation with similar Triassic successions in the Balkans to the West and the Istanbul Terrane to the East.
机译:在靠近土耳其-保加利亚边界的伊斯特拉卡断层块的西北部,重结晶的石灰岩在德国型河流碎屑(Buntsandstein等价物)之上产生了棘皮动物和双壳类动物的遗骸。石灰石呈类透镜状,呈灰质层状且生物扰动,就像在德国型Muschelkalk中常见的Holocrinus lagerstatten一样。充分保存的海百合小骨可以归为Holocrinus属,这是一种在全球早,中,三叠纪沉积物中普遍存在的海百合类。这是迄今为止Istranca Massif的第一个三叠纪化石数据,并为与西巴尔干半岛和东伊斯坦布尔伊斯坦堡地带的类似三叠纪演替的相关性提供了证据。

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