Workshop: The Late Paleozoic Gondwanan Ice Age: Towards a More Refined Understanding of Timing, Duration, and Character

研讨会：古生代晚期冈瓦纳冰河时代：对时间、持续时间和特征有更深入的了解

• 批准号: 0533082
• 负责人: Christopher Fielding
• 金额: $ 3万
• 依托单位: University of Nebraska-Lincoln
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-07-01 至 2006-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0533082&HistoricalAwards=false
• 关键词: Workshop; Late; Paleozoic; Gondwanan; Ice

This workshop will focus on the late Paleozoic Gondwanan Ice Age, which was one of the most significant intervals of "icehouse" climate in Phanerozoic Earth history. This ice age is hypothesized to have had a profound influence on Earth's climate, sea level, depositional systems, and biogeography. To date, however, the overall timing, duration, and character of this interval and its stratigraphic record remain controversial. Part of the problem has been a lack of suitably precise stratigraphic frameworks that can be used to constrain observations. But also, at least in certain areas, the documentation of glacial deposits has not been rigorous, relying on what are now known to be non-diagnostic criteria such as the presence of diamictites in the rock record. In recent years, a number of scientists have been working to improve understanding of this complex period of Earth history. These include lithostratigraphers, sedimentologists, biostratigraphers and paleontologists, and sedimentary geochemists. To date, however, there has been no opportunity for all of these researchers to integrate the growing body of knowledge into a holistic framework. This workshop will provide the much needed venue.In terms of broader impacts, this workshop will promote international collaboration, broaden the perspective of U.S. scientists, and provide an opportunity for the next generation of scientists to interact with leaders in the field. Outcomes will be published in a proceedings volume, and have societal relevance in understanding global climate change.

本次研讨会将重点关注古生代冈瓦纳冰河时代晚期，这是显生宙地球历史上最重要的“冰室”气候时期之一。据推测，这个冰河时代对地球的气候、海平面、沉积系统和生物地理学产生了深远的影响。然而，迄今为止，该区间的总体时间、持续时间和特征及其地层记录仍然存在争议。部分问题是缺乏可用于限制观测的适当精确的地层框架。但至少在某些地区，冰川沉积物的记录并不严格，依赖于现在已知的非诊断标准，例如岩石记录中是否存在混积岩。近年来，许多科学家一直致力于增进对地球历史这一复杂时期的了解。其中包括岩石地层学家、沉积学家、生物地层学家和古生物学家以及沉积地球化学家。然而，迄今为止，所有这些研究人员还没有机会将不断增长的知识体系整合到一个整体框架中。这次研讨会将提供急需的场所。在更广泛的影响方面，这次研讨会将促进国际合作，拓宽美国科学家的视野，并为下一代科学家提供与该领域领导者互动的机会。结果将发表在会议记录中，对于理解全球气候变化具有社会意义。