Supplementary files for: Stratigraphy of the Upper Jurassic to lowermost Cretaceous in the Rødryggen-1 and Brorson Halvø-1 boreholes, Wollaston Forland, North-East Greenland

Two shallow cores drilled in northern Wollaston Forland, North-East Greenland, provide a combined section covering the upper Kimmeridgian (Upper Jurassic) – Barremian (Lower Cretaceous) and comprising the Bernbjerg, Lindemans Bugt, Palnatokes Bjerg and Stratumbjerg Formations. A new lithostratigraphic unit, the Storsletten Member, is defined within the Lindemans Bugt Formation. The black mudstone-dominated intervals are dated primarily by dinoflagellates and ammonites, whereas the calcareous mudstones of the Palnatokes Bjerg Formation – sandwiched between the black mudstones – are dated by calcareous nannofossils. The stratigraphy demonstrates an almost complete succession in the Rødryggen-1 core, representing a deeper position in the basin, where the hiatus at the latest Jurassic rift climax predicted in previous models for the eastern Wollaston Forland Basin is absent. In contrast, the Brorson Halvø-1 core represents a position closer to a block crest where unconformities developed. In combination, the cores provide a key biostratigraphic reference section for the Jurassic–Cretaceous boundary interval in the Arctic.在格陵兰东北部沃尔斯顿弗罗兰德（Wollaston Forland）北部钻取的两段浅钻岩芯，其组合地层序列覆盖了启莫里阶上段（晚侏罗世）至巴列姆阶（早白垩世），包含伯恩贝格组（Bernbjerg Formation）、林德曼湾组（Lindemans Bugt Formation）、帕尔纳托克斯山组（Palnatokes Bjerg Formation）与斯特伦山组（Stratumbjerg Formation）。本研究在林德曼湾组内部定义了一个新的岩石地层单元——斯托斯莱滕段（Storsletten Member）。以黑色泥岩为主的地层间隔主要通过沟鞭藻与菊石进行年代标定，而夹于两套黑色泥岩之间的帕尔纳托克斯山组钙质泥岩，则以钙质超微化石作为定年依据。勒德里根-1（Rødryggen-1）岩芯的地层序列近乎完整，对应盆地内更深的沉积位置，此前针对沃尔斯顿弗罗兰德东部盆地模型所预测的晚侏罗世末期裂谷鼎盛期沉积间断在该岩芯中缺失。与之相反，布罗森半岛-1（Brorson Halvø-1）岩芯的沉积位置更靠近断块隆起区，发育有不整合面。上述两段岩芯共同构成了北极地区侏罗系-白垩系界线间隔的关键生物地层参考剖面。