We studied the upper Permian and Lower Triassic deposits from the northern and northwestern marginal part of the Holy Cross Mountains (SE part of the Central European Basin or CEB, Poland) to examine stratigraphic continuity between these two systems, and to revise the currently existing stratigraphic framework. A previously existing informal lithostratigraphic scheme has been revisited and placed in a broader chronostratigraphic and palaeoenvironmental context. Sedimentary continuity across the Permian–Triassic (P/T) boundary has been confirmed by the presence of Lueckisporites virkkiae Bc morphological norm and Lundbladispora obsoleta–Protohaploxypinus pantii palynomorphs. Facies development reflects an interplay between climatic variations and tectonism during late Permian – Early Triassic time. The P/T boundary was placed between the Siodła Formation and overlying Szczukowice and Jaworzna formations, which coincides with the classical Zechstein–Buntsandstein boundary in the SE part of the CEB. The facies changes recorded in the studied terrestrial succession of the P/T boundary shed light on the environmental dynamic prior, during and after one of the biggest biotic crises in Earth’s history.

中文翻译：

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中欧盆地（波兰圣十字山）东南缘大陆沉积演替中的二叠纪-三叠纪边界

我们研究了圣十字山脉北部和西北边缘部分（中欧盆地东南部或波兰 CEB）的上二叠统和下三叠统沉积物，以检查这两个系统之间的地层连续性，并修正目前存在的地层框架。先前存在的非正式岩石地层方案已被重新审视并置于更广泛的年代地层和古环境背景下。跨越二叠纪-三叠纪（P/T）边界的沉积连续性已通过存在Lueckisporites virkkiaeBc 形态范数和Lundbladispora obsoleta–原花青松孢粉虫。相发育反映了晚二叠世-早三叠世时期气候变化与构造作用之间的相互作用。P/T 边界位于 Siodła 组与上覆的 Szczukowice 和 Jaworzna 组之间，与 CEB 东南部的经典 Zechstein-Buntsandstein 边界一致。在研究的 P/T 边界陆地序列中记录的相变揭示了地球历史上最大的生物危机之一之前、期间和之后的环境动态。