Paleontology and Biostratigraphy of the Terminal Proterozoic and Earliest Cambrian Nama Group, Southern Naimbia

纳米比亚南部元古代末期和最早寒武纪纳马群的古生物学和生物地层学

• 批准号: 9627924
• 负责人: Bruce Runnegar
• 金额: $ 12.98万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-09-15 至 2001-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9627924&HistoricalAwards=false
• 关键词: Paleontology; Biostratigraphy; Terminal; Proterozoic; Earliest

9627924 Runnegar The Cambrian Explosion is the sixth of eight revolutionary advances in the history of life and one with obvious geological effects. The aims of this project are to document the history of life in the poorly understood (Neoproterozoic) stage of the Cambrian Explosion when most innovations were well underway. This will be achieved by using the largely unexplored but appropriately fossileferous Nama Group succession in southern Namibia as the primary source of data. The Nama Group succession is a well-exposed, flat lying, foreland basin succession that contains a variety of fossils (Ediacaran soft bodied fossils, trace fossils, calcareous fossils) at several stratigraphic levels. Equally important, existing knowledge of the sequence stratigraphy, carbon isotope stratigraphy, and U-Pb geochronology makes it possible to relate the biological evolution to environmental events that could be global in character. It may therefore be possible to tease apart the intrinsic and extrinsic factors that were driving or being driven by the Cambrian Explosion of complex multicellular life. Building on reconnaissance work carried out in Namibia in 1993 and 1995, we shall begin to document the biostratigraphy and paleoecology of the Nama Group in the southern Witputs Basin in 1996. This will involve extensive field exploration and observation as well as collecting fossils, measuring sections, tracing formation and sequence boundaries, and sampling for carbon isotope chemostratigraphy. The laboratory work will be completed in the following twelve months so that the results can be sent to press before extending the field work to the northern Zaris Basin in subsequent years. The expected long-term outcomes are: (1) Documentation of the Stratigraphic ranges of the fossils and trace fossils with respect to formations, facies boundaries, sequence surfaces, carbon isotope excursions, and ash beds with precise U=Pb ages. These data will form the framework for a global standard success ion for Neoproterozoic biostratigraphy. (2) A deeper understanding of the evolution of the southern Namibian sedimentary basins through better time control and better environmental interpretations based on information obtained from the integrated data. (3) Documentation of the morphology, taphonomy, and paleoecology of a wide range of fossils and trace fossils, including some significant new soft-bodied organisms found in 1993 and 1995. The data should provide new evidence for the nature of core members of the Ediacara "fauna" such as Pteridinium and Ernietta and their life habits. (4) New sights into the timing and relationships of biological and environmental events at the close of the Neoproterozoic. (5) Development and explanation of a major natural heritage resource for the citizens of the Republic of Namibia.

9627924伦纳加（Runnegar）寒武纪爆炸是生命史上八个革命进步中的第六名，并且具有明显的地质影响。该项目的目的是记录寒武纪爆炸率不佳的阶段，当时大多数创新都在进行良好的情况下。这将通过使用大量未开发但适当的纳米比亚南部纳玛群体继承作为数据来源来实现。 NAMA群体的继承是一个曝光良好的，扁平的前盆地盆地演替，其中包含多种化石（Ediacaran柔软的身体化石，痕量化石，钙质化石），这些化石具有多种地层水平。同样重要的是，对序列地层，碳同位素地层学和U-PB的现有知识同样重要，这使得将生物学演变与可能具有全球特征的环境事件联系起来成为可能。因此，可能可以取笑由复杂多细胞生命的寒武纪爆炸驱动或驱动的内在和外部因素。 Building on reconnaissance work carried out in Namibia in 1993 and 1995, we shall begin to document the biostratigraphy and paleoecology of the Nama Group in the southern Witputs Basin in 1996. This will involve extensive field exploration and observation as well as collecting fossils, measuring sections, tracing formation and sequence boundaries, and sampling for carbon isotope chemostratigraphy.实验室工作将在接下来的十二个月内完成，以便在随后的几年将现场工作扩展到北部扎里斯盆地之前，可以将结果汇总到阵地。预期的长期结局是：（1）相对于地层，相边界，序列表面，碳同位素偏移和具有精确U = PB年龄的灰烬床的化石和痕量化石的地层范围的文献。这些数据将构成全球标准成功离子的框架，用于新元古代生物地层学。 （2）根据从综合数据获得的信息，通过更好的时间控制和更好的环境解释对南部纳米比亚沉积盆地的演变有了更深入的了解。 （3）关于多种化石和追踪化石的形态，taphonomy和古生物学的文献，包括1993年和1995年发现的一些重要的新型软体型生物。数据应为Ediacara“ Fauna”的核心成员提供新的证据，例如pteridinium和pteridinium and Ernietta和他们的生活。 （4）在新元古代结束时生物学和环境事件的时机和关系的新景象。 （5）为纳米比亚共和国公民开发和解释主要的自然遗产资源。