EAR-PF: Testing the boundaries of Burgess Shale-Type preservation with literature meta-analysis, decay experimentation, and fossil investigation

EAR-PF：通过文献荟萃分析、腐烂实验和化石研究测试伯吉斯页岩型保存的界限

• 批准号: 1725762
• 负责人: Evan Anderson
• 金额: $ 17.4万
• 依托单位: Anderson Evan P
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-10-01 至 2021-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1725762&HistoricalAwards=false
• 关键词: EAR; PF; Testing; boundaries; Burgess

Dr. Evan Anderson has been granted an EAR Postdoctoral Fellowship to carry out research and education plans at the University of Missouri. The research plan will focus on studying the Burgess Shale-type (BST) mode of soft-bodied preservation from multiple approaches to better understand the scope and operational mechanisms of this paleontologically important preservation mode. Soft-bodied fossils can provide ecological and evolutionary information available nowhere else in the fossil record. The education activities will include developing teaching modules for K12 and undergraduate students. The materials for these modules will include common softbodied materials (i.e. graptolites and plant debris), 3-D printed and traditional print-outs of exceptional soft-bodied materials, and materials collected for this study. This investigation will have three components. First, a literature meta-analysis will study and expand a compendium of exceptional soft-bodied fossil deposits (or lagerstätten) to isolate BST and BST-like deposits throughout earth history. Comparing these deposits will both highlight shared characteristics and explore the variation within the BST mode of fossilization. Second, decay experiments will test two models of BST preservation for their effectiveness in slowing soft-bodied degradation. One experiment will test the hypothesis that complex bioturbation prevents BST preservation by oxygenating sediments and enhancing decay by simulating different kinds of burrows penetrating the sediment in which a decay organism is buried. The second experiment will test the hypothesis that elevated calcium and alkalinity levels allows for the development of calcite permeability seals in BST deposits, protecting buried organisms from degradation. Finally, a fossil-based investigation will compare the burial context and fossil preservation of freshly collected material from the BST-like Winneshiek and Waukesha lagerstätten to traditional open marine BST deposits from the Cambrian House Range of Utah. Although the BST-like deposits come from post-Cambrian deposits with restricted water circulation, if the fossil preservational mineralogies and qualities are similar between the BST-like and BST deposits, then their burial environment conditions should be comparable (i.e. calcite seals).

埃文·安德森（Evan Anderson）博士一直在密苏里大学（University of Missouri）进行研究和教育计划。这种重要的保存模式。 。 ，衰减实验将使BST降低降解性的BST降解。钙和碱度水平的膨胀在BST沉积物中的有方解石的纤维化，保护埋藏的生物免受降解，并保存新鲜收集的材料，免受Winneshiek和Waukesha Lagerstten的侵害。 BST样沉积物来自循环局部循环的纸床的沉积物，在BST样和BST沉积物之间的质量相似，其埋葬环境条件应相当（即方解石密封件）。