The Holocene ( IF 1.6 ) Pub Date : 2021-01-17 , DOI: 10.1177/0959683620988046 Morten Smelror 1 , Dirk Knaust 2
Trace fossils and palynomorphs are recorded for the first time in Holocene calcareous concretions from Lake Selbusjøen, Central Norway. The described trace fossils can be assigned to the Mermia ichnofacies, characterizing lake deposits with good oxygenation and low depositional energy. The predominance of simple grazing trails and shallow burrows (e.g. Cochlichnus, Helminthoidichnites and Treptichnus) in silty and sandy concretions possibly represent relatively low-energy sublittoral parts of the lake, while the occurrence of Vagorichnus and Arenicolites in sandy substrate points to littoral and shallow sublittoral areas with moderate depositional energy. The trace fossils and palynomorph assemblages from Lake Selbusjøen appear to relate to periods of climatic warming during Pre-Boreal times, and possibly also Atlantic times.
中文翻译:
挪威中部塞尔布乔恩湖全新世钙质凝结物中的痕迹化石和古怪物:冰川后的环境记录
挪威中部塞尔布舍恩湖全新世钙质凝结物中首次记录到痕迹化石和古怪物。所描述的痕迹化石可以归因于鱼眼鱼类,表征具有良好的氧合作用和低沉积能的湖泊沉积物。在粉质和沙质的结石中,主要是简单的放牧径和浅埋的洞穴(例如,Cochlichnus,Helminthoidichnites和Treptichnus),可能代表了湖中能量相对较低的湖滨亚部分,而Vagorichnus和Arenicolites的发生砂质底物中的“点”指向具有适度沉积能的滨海和浅海沿岸地区。Selbusjøen湖的痕迹化石和古怪的组合似乎与北冰洋前时期甚至大西洋时期的气候变暖时期有关。