منابع مشابه
The Iranian Communists and The Soviet Union
Iran's relation with one of the largest countries, that is, Russia (The Soviet Union) has under gone many changes. One of the brilliant examples of the changing policies of Russia towards Iran is, no doubt, the years 1941 to 1953. In this period, most of graceful communist parties' rise and fall is making relations between Iran and Russia. Tudeh party, Ferghe Democrate Azerbaijan and Ferghe Dem...
متن کاملThe Origin of Gypsum in the Mars North Polar Region
Introduction: The OMEGA instrument on Mars Express has recently detected the largest gypsum deposit on Mars within the north polar sand sea [1]. Here we discuss the unique geologic context and origin of this evaporite deposit. Gypsum on Earth and Mars: Gypsum is a hydrated Ca-sulfate (2H 2 O • CaSO 4). Though gypsum can be formed, for example, as a hydrothermal deposit [e.g., 2] or as an altera...
متن کاملextensions of some polynomial inequalities to the polar derivative
توسیع تعدادی از نامساوی های چند جمله ای در مشتق قطبی
15 صفحه اولMeter-scale morphology of the north polar region of Mars.
Mars' north pole is covered by a dome of layered ice deposits. Detailed ( approximately 30 centimeters per pixel) images of this region were obtained with the High-Resolution Imaging Science Experiment on board the Mars Reconnaissance Orbiter (MRO). Planum Boreum basal unit scarps reveal cross-bedding and show evidence for recent mass wasting, flow, and debris accumulation. The north polar laye...
متن کاملNorth polar stratigraphy and the paleo-erg of Mars
[1] An accurate self-consistent way of coregistering the imaging and topographic data sets of the Mars Global Surveyor mission was developed and used to begin a stratigraphic analysis of the northern polar region. A distinct change in the layering style exists at a definite stratigraphic horizon near the base of the north polar layered deposits. Occurrences of the contact between two distinct l...
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ژورنال
عنوان ژورنال: Nature
سال: 1937
ISSN: 0028-0836,1476-4687
DOI: 10.1038/1401040a0