نتایج جستجو برای: sedimentary structures

تعداد نتایج: 464979  

2017
Yuanzhi Zhang Zhaojun Huang Yu Li Qing Yu Bing Wang Tingchen Jiang

This chapter presents the Late Quaternary neo-tectonic movement in the Pearl River Delta (PRD) region of China and its effects on the coastal sedimentary environment. Taking the Xilin Hill fault as the example, we have explained the reason of the PRD formation, inferred its interactions with local/regional climate and sea-level changes, and analyzed the evolution of the PRD formation and its co...

2007
H. DURAN

In the Catalonian Coastal Ranges, Paleozoic sedimentary and meta-sedimentary rocks crop out in severa1 areas, intruded by late tectonic Hercynian granitoids and separated by Mesozoic and Tertiary cover sediments. Large structures are often difficult to recognize, although a general east-west trend can be observed on the geological map. Deformation was accompanied by the development of cleavages...

2017
Junyoung Ko Sangseom Jeong

This paper presents new valuable field data and a comprehensive approach to the determination of the rock mass classification and tunnel support systems for tunnels in unconsolidated sedimentary rocks as a special soil condition. The main objective of this study is to investigate and present the characteristics of the unconsolidated sedimentary rock by using the point load tests and slake durab...

2016
Jian Yang Hongchen Jiang Geng Wu Wen Liu Guojing Zhang

Little is known about the relative importance of spatial and environmental factors to structuring aquatic and sedimentary microbial biogeography in lakes. Here, we investigated the microbial community composition (MCC) of the water (n = 35) and sediment (n = 35) samples from 16 lakes in western China (salinity: freshwater to salt saturation; pairwise geographical distance: 9-2027 km) using high...

Journal: :Marine environmental research 2014
Thomas A Wilding

The number of man-made structures to be placed in the marine environment is set to increase massively in the near future as a consequence of the wide-scale adoption and commercialisation of offshore electricity generation. Marine renewable energy devices (MREDs) interact with their receiving environment and are de-facto artificial reefs. The Loch Linnhe Artificial Reef (LLR) complex is a large-...

2012
E. WILLIAMS

A number of sedimentary structures, which have previously not been described anywhere in Tasmania, are developed in the Scamander Slates and Quartzites, near Upper Scamander. These structures include mar!{ings made in muds that have been preserved as casts on the soles of graded sandstones and coarse-grained siltstones. It is well known that certain sole markings, such as flute casts, indicate ...

Journal: :رخساره های رسوبی 0
مریم منصوری هفشجانی حسین رحیم پور بناب وحید توکلی

primary sedimentary and secondary structural and diagenetic processes are responsible for heterogeneity in carbonate reservoirs and recognition of these factors is very essential subject in modeling these reservoirs. image logs are very useful for identification of structures and small scale sedimentary features. in this research, using image analysis of formation microimager log (fmi) in a dri...

F. Sotohian M. Ranjbaran

Mud volcanoes are defined as main elements of geological structures and ways through and within which buried argillaceous loose sediments and lithified rocks. The Gharniaregh Tappeh and Naftelijeh mud volcanoes are the most attractive geomorphological phenomena in continental which appear along the eastern coast of the Caspian Sea. The Naftelijeh mud volcano is more active than Gharniaregh–Tapp...

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