Paleoethologic and Paleoecologic Significance of Upper Cretaceous Ichnofabrics, Denmark and Sweden

丹麦和瑞典上白垩纪遗迹的古动物学和古生态学意义

• 批准号: 9814255
• 负责人: Allan Ekdale
• 金额: $ 2.5万
• 依托单位: University of Utah
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-03-01 至 2001-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9814255&HistoricalAwards=false
• 关键词: Paleoethologic; Paleoecologic; Significance; Upper; Cretaceous

9814255EkdaleThis is a one-year project to investigate the paleoethologic importance, paleoecologic significance and sedimentologic implications of composite ichnofabrics in Upper Cretaceous (Maastrichtian) chalk deposits in Denmark and southern Sweden. An ichnofabric encompasses all aspects of the sediment fabric, texture and structure, as well as early diagenetic phenomena that can be attributed to the bioerosion activities of benthic organisms. A composite ichnofabric consists of a complex of biogenic structures that reflect the tiered arrangement of infaunal animals in a trace fossil community. The research plan includes the following objectives: to determine and describe the spectrum of variation of the diverse ichnofabrics in the Danish and Swedish chalks; to decipher and explain the paleoethologic and paleoecologic significance of particular ichnofabrics, especially in terms of vertical partitioning of the extremely fine-grained substrate; to relate the recurrent ichnofabrics to the various sedimentary microfacies within the chalk units; and to produce a photographic atlas that reveals the details of composite ichnofabrics in the chalks.

9814255 Ekdale这是一个为期一年的项目，调查在丹麦和瑞典南部的上白垩统（马斯特里赫特阶）白垩沉积的复合遗迹组构的古生态学的重要性，古生态学的意义和沉积学意义。 遗迹组构包括沉积物组构、结构和结构的所有方面，以及可归因于底栖生物侵蚀活动的早期成岩现象。 复合遗迹组构由反映遗迹化石群落中底栖动物分层排列的复杂生源结构组成。 研究计划包括以下目标：确定和描述丹麦和瑞典白垩中各种遗迹组构的变化谱;破译和解释特定遗迹组构的古动物行为学和古生态学意义，特别是在极细粒基质的垂直分隔方面;将重现的遗迹组构与白垩单位内的各种沉积微相联系起来;并制作一个摄影图集，揭示粉笔中复合遗迹组构的细节。