Collaborative Research: RUI: A High resolution Paleontological, Ichnological, and Chemostratigraphic Study of Late Devonian Mass Extinctions

GSTDTAP

项目编号	1664247
	Collaborative Research: RUI: A High resolution Paleontological, Ichnological, and Chemostratigraphic Study of Late Devonian Mass Extinctions
	Diana Boyer
主持机构	Winthrop University
项目开始年	2016
	2016-09-01
项目结束日期	2017-04-30
资助机构	US-NSF
项目类别	Continuing grant
项目经费	12687(USD)
国家	美国
语种	英语
英文摘要	RUI, Collaborative Research: A High resolution Paleontological, Ichnological, and Chemostratigraphic Study of Late Devonian Mass Extinctions by Diana Boyer, EAR-1348981, SUNY Oswego Gordon Love, EAR-1348988, Univ. California, Riverside ABSTRACT The rock record preserves a detailed history of past events in life history, and understanding these events, particularly episodes of unusual biotic turnover, is of paramount importance, particularly in this time of our current diversity crises. There have been many large scale extinction events throughout geologic history, and despite extensive study, the Late Devonian mass extinction events in the Frasnian-Famennian still remain enigmatic in terms of a causal mechanism. Although numerous kill mechanisms have been proposed, marine anoxia is widely thought to be a major contributing factor, in part because of the pervasiveness of organic-rich black shale. This study will test for extensive anoxic and/or pervasive euxinic (sulfidic water column) conditions associated with several biotic turnover events preserved in a Laurentian basin. PIs will use an integrated paleontological, inorganic geochemical, and lipid biomarker approach performed at high spatial resolution to reconstruct secular changes in ancient microbial and metazoan source organism inputs, and marine redox structure in these ancient epeiric seaways. They will test for a correlation between the magnitude and timing of extinction events and patterns of oxygen and euxinic stress which prevailed. The utility of combining paleontological and geochemical proxies to recognize bottom water oxygen levels on a fine-scale in black shale facies has been realized (Boyer et al., 2011), but not yet applied to understand the dynamics of major events in the history of life. The new light we are shedding on Late Devonian biospheric and environmental evolution in North America will inform and direct future work in biogeochemistry, paleontology/paleobiology, evolutionary biology, and ocean-atmosphere evolution. Central to this research is a unique bridging of organic and inorganic geochemical methods with paleontology within a broad field-based template to yield high-resolution bio- and chemostratigraphic records that span the Late Devonian mass extinction events and their aftermath. At the heart of this research proposal is the training and education of a group of talented graduate, undergraduate and K-12 school students in the geosciences at UCR and SUNY Oswego, many from underrepresented ethnic groups, through a combination of direct involvement in the research project or through a variety of outreach ventures.
来源学科分类	Geosciences - Earth Sciences
文献类型	项目
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/70078
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	Diana Boyer.Collaborative Research: RUI: A High resolution Paleontological, Ichnological, and Chemostratigraphic Study of Late Devonian Mass Extinctions.2016.