نتایج جستجو برای: lowstand

تعداد نتایج: 110  

2009
C. HANS NELSON CARLOTA ESCUTIA

Three case studies are used to exemplify the wide variety of controlling factors that combine to influence the development of modern turbidite systems, and how these vary with location and time. For example, Cascadia Basin in the Pacific Ocean off western North America, which is underlain by the Cascadia Subduction Zone, exhibits the dominant tectonic control of earthquake triggering for turbid...

Journal: :Science 2006
Guillemette Ménot Edouard Bard Frauke Rostek Johan W H Weijers Ellen C Hopmans Stefan Schouten Jaap S Sinninghe Damsté

During the Last Glacial Maximum, the sea-level lowstand combined with the large extent of the Fennoscandian and British ice sheets led to the funneling of European continental runoff, resulting in the largest river system that ever drained the European continent. Here, we show an abrupt and early reactivation of the European hydrological cycle at the onset of the last deglaciation, leading to i...

Journal: :Geoarchaeology-an International Journal 2021

The impacts of relative sea-level (RSL) variations and crust mobility on the development ancient harbours in northern Persian Gulf are poorly understood. Many unanswered questions remain with regard to main reasons for a shift location most important part coastal since 50 BC. Furthermore, some early Islamic harbours, such as Siraf, have city quarters that today below present sea level. aim this...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تهران - دانشکده علوم اداری و مدیریت بازرگانی 1380

هدف اصلی از تحقیق خاضر یافتن علل زیربنایی طولانی بودن تشریفات گمرکی ناشی از اجرای برنامه زمانبندی کاهش تشریفات گمرکی قبلی و ارائه راه حل موثر و مطلوب بمنظور تقلیل تشریفات میباشد. نتایج این تحقیق از نظر گمرک ایران را میتوان بصورت خلاصه چنین آورد: 1-جلوگیری از اتلاف نیروی انسانی سازمان (علاوه بر نیروی انسانی مراجعان)، 2-افزایش راندمان و اثربخشی فعالیتهای گمرکات تجاری که مهمترین واحدهای اجرایی ساز...

2006
Wayne R. Wright

Morrowan-age units in the Permian Basin appear to show a “second-order” transgression from siliciclastic fluvial-deltaic to shallow-marine and subsequently to carbonate deposition. In general, Morrowan-age siliciclastics dominate deposition in the west of the Permian Basin, while carbonate deposition dominates in the east. The predominance of carbonate facies in the east is due to a lack of sil...

Journal: :Journal of Maps 2021

This paper presents a geomorphological map of the seafloor north east Maltese Islands (Central Mediterranean) at scale 1:50,000. The was compiled following integration, analysis and interpretation several high-resolution bathymetry datasets. Several structural features, coastal marine landforms anthropogenic features have been mapped. Most mapped submerged – including fluvial, gravity-induced k...

1999
David R. Lemons Marjorie A. Chan

This study documents the effects of changing lake level (limnostasy), tectonics, sediment yield, and basin physiography on the facies architecture, sequence stratigraphy, and reservoir quality of three fine-grained deltas deposited along the eastern margin of late Pleistocene Lake Bonneville. Analysis of facies architecture indicates that the Weber and Spanish Fork deltas were strongly wavemodi...

Journal: :Marine and Petroleum Geology 2021

Abstract The purpose of this study is to differentiate and characterise contouritic sands in two different locations with variable sediment compositions (siliciclastic bioclastic) based on a multiproxy approach that includes the analysis sedimentary texture, semi-quantitative geochemistry, microfacies ichnological information, as well Principal Component Analysis (PCA) applied geochemical data ...

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