نتایج جستجو برای: lacustrine environment

تعداد نتایج: 519568  

Journal: :Geochemistry Geophysics Geosystems 2022

To investigate the subsurface structure surrounding Main Frontal Thrust (MFT) in central Nepal, we drilled and cored sediments to depths of 45–100 m at 10 sites. Our boreholes were located along previously acquired high-resolution seismic profiles across MFT imaging upper 1–2 km subsurface, which revealed a beveled erosional surface hanging wall above broad, gentle anticline, as well growth str...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی عمران 1391

one of the most commonly used techniques to reduce the corrosion rate of rebar in concrete is addition substances named corrosion inhibitors into the concrete. corrosion inhibitor is chemical compounds that were added to concrete to prevent corrosion of steel in concrete. sodium nitrate is a type of anodic inhibitors that this study investigatesthe effect of this inhibitor on the properties of ...

Journal: : 2022

The purpose of the article. article is devoted to study one from forms syndynamics in Late Pennsylvanian time, namely phytocoenogenesis. phytocoenogenesis ancient plant communities, i.e., formation new types palaeophytocoenoses, based on research vegetation diversity that reflected ecological-floristic classification phytocoenoses Donets Basin by Brown-Blanquet method. Material and methods. phy...

2015
James L. Fastook James W. Head

Geological evidence for extensive non-polar ice deposits of Amazonian age indicates that the current cold and dry climate of Mars has persisted for several billion years. The geological record and climate history of the Noachian, the earliest period of Mars history, is less certain, but abundant evidence for fluvial channels (valley networks) and lacustrine environments (open-basin lakes) has b...

شمعانیان, غلامحسین, شفیعی, بهنام , کیا ‌اشکوریان, مریم ,

Paleosols of the study area is a part of the Eastern-Alborz Zone which is located about 50 km southeast of Azadshahr. These paleosols developed on floodplain and lacustrine facies of the Devonian Padeha Formation. Based on the field and textural evidences, two major paleosol horizons identified as A and B horizons. The A horizon consists of calcrete and noncalcrete paleosols which is located in...

Journal: :geopersia 2012
haleh rezaeian azizollah taheri

this study is focused on the biostratigraphy, sedimentary environments, facies distribution, and sequence stratigraphy of the coniacian–santonian sediments of tange-bulfaris section. five assemblage zones have been recognized by distribution of the foraminifera in the study area. assemblage zone 1(chara ostracods zone) is coniacian in age and occurs in the lower part of the succession. assembla...

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