Paleoecology, Biogeography and Systematic Paleontology of Ordovician Sponges from Eastern Canada and Western United States
加拿大东部和美国西部奥陶纪海绵的古生态学、生物地理学和系统古生物学
基本信息
- 批准号:9116202
- 负责人:
- 金额:$ 9.22万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:1991
- 资助国家:美国
- 起止时间:1991-12-01 至 1998-05-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Early Paleozoic poriferans of the Western Hemisphere are among the least known of fossil invertebrate phyla, even though they are important constituents of reefs and inter-reef faunas, and even though North America seemed to have functioned as a major center of sponge evolution during the early Paleozoic. Objectives of the research are to publish monographic and synthesis papers on major Lower and Middle Ordovician faunas, from North America, including those from classic stratigraphic sections in western Newfoundland and from the Mingan Islands of eastern Quebec. These faunas are from the northern part of the Appalachian-Maritime region, which was on the southeastern margin of the Ordovician paleocontinent. Other major faunas to be studied are from Lower and Middle Ordovician rocks in the Confusion Range (Ibex area) of western Utah, and from equivalent rocks of the Toquima Range-Eureka-Ruby Mountain are of central and east-central Nevada. These latter faunas represent those from the northwestern margin of the Ordovician North American paleocontinent. Fossil sponges to be studied were generally collected from measured stratigraphic sections that have been selected as type or reference sections and that characterize broad regions in North America. Fossils will be studied using standard thin-section and acetate-peel techniques because the originally siliceous skeletons have been largely replaced by calcium carbonate in most fossils in the collection. A few potentially etchable sponges have been collected from Utah and Nevada, and they will be processed in dilute acids. Even fragments of such sponges have proven to be important because they show skeletal details that are often obscure in calcareous preservations. Taxonomy, paleoecology, stratigraphic and paleogeographic distributions and potential for biostratigraphic zonation, along with evolution of the assemblages, will be treated in an effort to present uniform data and synthesis of the scattered and uneven literature.
西半球早古生代的多孔动物是最鲜为人知的化石无脊椎动物门之一,尽管它们是珊瑚礁和礁间动物群的重要组成部分,而且北美似乎是早古生代海绵进化的主要中心。 该研究的目标是发表有关北美下奥陶世和中奥陶世主要动物群的专题论文和综合论文,包括来自纽芬兰西部和魁北克东部明安群岛的经典地层剖面的动物群。 这些动物群来自阿巴拉契亚滨海地区的北部,位于奥陶纪古大陆的东南边缘。 其他待研究的主要动物群来自犹他州西部混乱山脉(野山羊地区)的下奥陶世和中奥陶世岩石,以及内华达州中部和中东部托基马山脉-尤里卡-鲁比山的相应岩石。 后面这些动物群代表了来自奥陶纪北美古大陆西北边缘的动物群。 要研究的海绵化石通常是从测量的地层剖面中收集的,这些剖面已被选为类型或参考剖面,并且具有北美广大地区的特征。 将使用标准薄片和醋酸盐剥离技术对化石进行研究,因为在收藏的大多数化石中,最初的硅质骨骼已大部分被碳酸钙所取代。 从犹他州和内华达州收集了一些可能可蚀刻的海绵,它们将在稀酸中进行处理。 事实证明,即使是这种海绵的碎片也很重要,因为它们显示了在钙质保存物中通常难以察觉的骨骼细节。 将处理分类学、古生态学、地层和古地理分布以及生物地层分区的潜力,以及组合的演化,以努力提供统一的数据和对分散和不均匀文献的综合。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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J. Rigby其他文献
Adult-Onset Acral Peeling Skin Syndrome in a Non-Identical Twin: A Case Report in South Africa
异卵双胞胎成人发病的肢端脱皮皮肤综合征:南非的病例报告
- DOI:
- 发表时间:
2014 - 期刊:
- 影响因子:0
- 作者:
R. Mathew;O. Omole;J. Rigby;W. Grayson - 通讯作者:
W. Grayson
Transition metal-promotedhigher order cycloaddition reactions
过渡金属促进的高阶环加成反应
- DOI:
10.1016/s1045-0688(06)80005-5 - 发表时间:
1995 - 期刊:
- 影响因子:0
- 作者:
J. Rigby - 通讯作者:
J. Rigby
Total synthesis of (.+-.)-grosshemin
(.-.)-grosshemin的全合成
- DOI:
- 发表时间:
1987 - 期刊:
- 影响因子:0
- 作者:
J. Rigby;C. Senanayake - 通讯作者:
C. Senanayake
Catalytic Chromium(0)-Promoted [6π + 4π] Cycloaddition Reactions
催化铬(0)-促进的 [6π + 4π] 环加成反应
- DOI:
- 发表时间:
1997 - 期刊:
- 影响因子:0
- 作者:
J. Rigby;C. Fiedler - 通讯作者:
C. Fiedler
J. Rigby的其他文献
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{{ truncateString('J. Rigby', 18)}}的其他基金
COLLABORATIVE RESEARCH: Biostratigraphic, Biogeographic, & Paleoecologic Significance of Calcareous Sponges, Upper Capitan Limestone (Late Permian), Guadalups Mountains, N
合作研究:生物地层学、生物地理学、
- 批准号:
9321726 - 财政年份:1993
- 资助金额:
$ 9.22万 - 项目类别:
Standard Grant
Systematic Studies of Four Major Ordovician Sponge Faunas From North America and Australia
北美和澳大利亚奥陶纪四大海绵动物群的系统研究
- 批准号:
8200860 - 财政年份:1982
- 资助金额:
$ 9.22万 - 项目类别:
Standard Grant
Paleontology an Depositional Environments of the Middle Cambrian Marjum and Wheeler Formations, House Range, Utah
中寒武纪 Marjum 和 Wheeler 地层的古生物学和沉积环境,House Range,犹他州
- 批准号:
8201428 - 财政年份:1982
- 资助金额:
$ 9.22万 - 项目类别:
Standard Grant
Fossil Porifera of the Middle Cambrian Burgess Shale of British Columbia
不列颠哥伦比亚省中寒武统伯吉斯页岩的多孔动物化石
- 批准号:
7825229 - 财政年份:1979
- 资助金额:
$ 9.22万 - 项目类别:
Standard Grant
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