Reported ancient bottom current deposits in deep marine settings are scarce and most of them remain contentious. This study describes sedimentological, ichnological and petrographical characteristics of a drill core that covers ca 10 Myr of Upper Cretaceous stratigraphy at Hold with Hope, north‐east Greenland. The core is divided into four facies associations, which are interpreted to reflect deposition from bottom currents, turbidity flows and hemipelagic settling in slope and/or near slope environments. The evidence for bottom current influence is three‐fold. Firstly, pervasive indications of winnowing such as marine bioclast‐rich lags and outsized clasts on ‘mud on mud’ contacts are suggestive of low‐sediment concentration flows capable of transporting up to pebble‐sized clasts. Common Mn–Fe–Mg rich carbonate matrix cements and various types of hiatal chemogenic lag deposits showing glauconite, apatite and carbonate clasts also point to condensation, prolonged exposure at the sediment–water interface and recurrent phases of sea‐floor erosion. Secondly, such deposits can show indicators for tidal processes such as double mud‐drapes, tangential bottom sets in dune‐scale cross‐bedding and cyclic rhythmites. Thirdly, inverse to normal grading at various scales is common in fully marine, commonly seafloor‐derived sediments. Ichnological data indicate considerable taxonomic variability in the bottom current deposits, but recurrent fabrics are characteristically dominated by morphologically simple burrows such as Thalassinoides and Planolites, with secondary Phycosiphon, Nereites, Zoophycos and/or Chondrites. In general, opportunistic taxa are common whereas mature composite ichnofabrics are rare. The omission surfaces are locally burrowed with stiffground to firmground trace fossil suites. The results contribute to establishing sedimentological, ichnological and mineralogical criteria for recognition of bottom current deposits as well as to the understanding of the Late Cretaceous palaeoenvironmental evolution of the Arctic region.

中文翻译：

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格陵兰岛东北部上白垩统底流沉积物

据报道，深海环境中的古代底流沉积物稀少，而且大多数仍存在争议。这项研究说明，涵盖了岩芯的沉积学，ichnological和岩相特征CA格陵兰东北部的霍尔德霍普，上白垩纪地层10 Myr。岩心分为四个相联系，它们被解释为反映在斜坡和/或接近斜坡环境中的底流沉积，浊流和半沉积。底部电流影响的证据有三点。首先，普遍存在的风吹迹象，例如海洋生物碎屑丰富的滞后和“泥上的泥浆”接触物上的碎屑过大，暗示着低泥沙浓度流能够输送到碎石大小的碎屑。常见的富含Mn–Fe–Mg的碳酸盐基质胶结物和各种类型的具有青绿岩，磷灰石和碳酸盐碎屑的裂隙性化学成因滞后沉积物，也表明凝结，沉积物-水界面的长时间暴露以及海床侵蚀的反复发生。其次，这样的沉积物可以显示出潮汐过程的指标，例如双泥盖布，沙丘规模交叉顺层中的切向底部集和周期性节律。第三，在完全海洋的，通常由海床衍生的沉积物中，普遍存在着与正常规模相反的分级。技术数据表明，底部流动沉积物的分类学差异很大，但循环织物的特征是形态简单的洞穴，例如Thalassinoides和Planolites，次要Phycosiphon，  Nereites，Zoophycos和/或球粒。通常，机会分类群是常见的，而成熟的复合鱼鳞织物则很少。遗漏的表面局部钻地，有坚硬的地面到坚硬的痕迹化石套件。研究结果有助于建立沉积学，水生学和矿物学标准，以识别底部的当前沉积物，并有助于了解北极地区的晚白垩世古环境演化。