نتایج جستجو برای: pre sedimentation basins
تعداد نتایج: 340721 فیلتر نتایج به سال:
In many ways, sediment transport dynamics in mountain environments differ from those of the lowlands. The high relief and the steep slopes are an obvious feature of mountain areas. The cold climate is another factor controlling runoff and erosional processes, and the distribution of vegetation is also controlled by the prevailing climate. Above the tree line, processes of erosion are more inten...
The solidification of the Lunar Magma Ocean (LMO) and formation of impact basins are important events that took place on the early Moon. The relative timing of these events, however, is poorly constrained. The aim of this study is to constrain the formation ages of old impact basins based on inferences of their thermal state. Most proposed basins formed before Pre-Nectarian (PN) 5 stage do not ...
0019-1035/$ see front matter 2010 Elsevier Inc. A doi:10.1016/j.icarus.2010.11.014 ⇑ Corresponding author. E-mail address: [email protected] (C.I. Fas The geological record of early Mars displays a variety of features that indicate fundamental differences from more recent conditions. These include evidence for: (1) widespread aqueous alteration and phyllosilicate formation, (2) the existe...
MOLA gridded data shows clear evidence for Quasi-Circular Depressions not visible on images in Early Noachian (EN) terrain units on Mars. We suggest these are buried impact basins that pre-date the superimposed craters whose high density makes these EN units the oldest visible at the surface of Mars. There is crust older than the oldest visible terrain units on Mars, and these EN units cannot d...
In the northern Iberian Peninsula, Pyrenean-Cantabrian orogenic belt extends E-W for ca. 1000 km between Atlantic Ocean and Mediterranean Sea. This orogen developed from collision Iberia Eurasia, mainly in Cenozoic times. Lower-middle Permian sediments crop out small, elongated basins traditionally considered independent each other due to misinterpretations on incomplete lithostratigraphic data...
Most of the developing countries particularly Indonesia will be facing the dilemmatic problems of sludge pressure in next decades due to increasing the legal and illegal loggings as well as the land and water demands resulting from the population growth, improved standard of people living and urbanization as well as economic and industrial developments. Consequence, there will be facing also th...
The performance of a conventional sequence (pre-ozonation, coagulation/flocculation/sedimentation, filtration, disinfection) and two advance sequences (pre-ozonation, nanofiltration; pre-ozonation, coagulation/flocculation/sedimentation, nanofiltration) on the removal of natural organic matter (NOM) and disinfection by-products (DBPs) formation potential was evaluated. Raw and treated waters we...
The late Carboniferous–early Permian represents a key period in the Phanerozoic history, given major global geodynamic and climate modifications. aim of this work is to better understand context characteristics sedimentation recorded continental environments eastern equatorial Pangea at time, through example Autun Basin (northeastern Massif Central, France). contains historical stratotype Autun...
The Pyrenean orogen extended eastward, across the present-day Gulf of Lion margin. late or post-orogenic dismantling this segment, contemporaneous with ongoing shortening in Spanish Pyrénées, is still debated. Understanding transition between two geodynamic events requires to document precise timing succession tectonic processes involved. We investigate superposition rifting structures over thr...
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