Results 181 to 190 of about 2,749 (215)
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Currents in the mantle and the geology of continents
Tectonophysics, 1991Abstract This paper is the first of a series which have considered the possible effects of currents in the mantle upon continents. It mentions effects of aging in oceans upon the direction of slope of coastal peneplains. When oceans are young the coasts are cliffs from which peneplains dip downward on the inland side.
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Anatomy of a Venusian hot spot: Geology, gravity, and mantle dynamics of Eistla Regio
Journal of Geophysical Research: Planets, 1992Eistla Regio is a series of broad swells, each up to a few thousand kilometers in diameter, in the equatorial highlands of Venus. It is characterized by strong positive free‐air gravity anomalies, shield volcanoes, and rift systems. We present a two‐part study of the western and central portions of this Venusian hot spot.
Robert E. Grimm, Roger J. Phillips
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The Deep Roots of Geology: Tectonic History of Australia as expressed by Mantle Anisotropy 
2022<p>Australia is an old stable continent with a rich geological history. Limitations in sub-surface seismic imaging below the Moho, however, mean that is unclear to what extent, and to what depth, this rich geological history is expressed in the mantle. Studies of seismic anisotropy, which reflect past/present mantle deformation, can offer
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Earthquake calamity warning from space station: orbital dynamics coupling geology mantle convection
SPIE Proceedings, 2009It is not surprising that the earthquakes happened among clashing tectonic plate boundaries where numerous earthquake stations exist. Then, why do we need more? The significance of Sichuan and Tongshan earthquakes of China is a wakeup call that major earthquakes of logarithmic Richter scales beyond 7 could happen exactly within a single tectonic ...
Harold H. Szu, Han-Shou Liu
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Environmental Earth Sciences, 2018
Engineering geological problems such as slope failure may be a result of the karst process. Slope stability evaluation is an effective way to minimize the losses caused by slope failure. In this study, a methodology is developed to evaluate the slope stability.
Peng Xie +3 more
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Engineering geological problems such as slope failure may be a result of the karst process. Slope stability evaluation is an effective way to minimize the losses caused by slope failure. In this study, a methodology is developed to evaluate the slope stability.
Peng Xie +3 more
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2013
The Wadagera kimberlite is situated near the northern bank of the Krishna River in northern Karnataka. It is the largest pipe in a cluster discovered by De Beers during exploration in 2002. The pipe has been dated at 1,083.8 ± 5.3 Ma, which corresponds to published ages of kimberlites in the adjacent Narayanpet cluster.
Michael Lynn, Sojen Joy, Robin Preston
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The Wadagera kimberlite is situated near the northern bank of the Krishna River in northern Karnataka. It is the largest pipe in a cluster discovered by De Beers during exploration in 2002. The pipe has been dated at 1,083.8 ± 5.3 Ma, which corresponds to published ages of kimberlites in the adjacent Narayanpet cluster.
Michael Lynn, Sojen Joy, Robin Preston
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2011 International Conference on Remote Sensing, Environment and Transportation Engineering, 2011
There are quite a few mantle xenoliths and one special Fe-rich melt xenolith in aegirine syenite porphyry, Liuhe, Yunnan province. Petrographic research shows that black opaque material that is Fe-rich glass, which are widely distribute reticulate along intergranular cracks of minerals, crystals fissues and cleavage in association with metasomatic ...
null Yating Chu, null Xianfan Liu
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There are quite a few mantle xenoliths and one special Fe-rich melt xenolith in aegirine syenite porphyry, Liuhe, Yunnan province. Petrographic research shows that black opaque material that is Fe-rich glass, which are widely distribute reticulate along intergranular cracks of minerals, crystals fissues and cleavage in association with metasomatic ...
null Yating Chu, null Xianfan Liu
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SEISMIC REFRACTION ANALYSIS OF WATERSHED MANTLE RELATED TO SOIL, GEOLOGY AND HYDROLOGY1
JAWRA Journal of the American Water Resources Association, 1974ABSTRACT: An extensive hammer seismic refraction survey was carried out in three contiguous watersheds (217, 89, and 190 acres) on a laccolith near Sturgis, South Dakota to test its utility in rugged mountain terrain. Isopachs (lines connecting points of equal mantle thickness), area‐elevation curves (hypsometry), and structure contours were used ...
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Diamonds and the geology of Earth mantle carbon
2012Diamond can crystallize throughout the mantle below about 150 km and while it exists metastably in the crust, it is the only material sampling the ‘very deep’ mantle to depths exceeding 800 km. Diamond has been intensively studied over the last 40 years to provide extraordinary information on Earth’s deep interior.
Shirey S. B. +8 more
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2005
Surface conditions on Mars are currently cold and dry, with water ice unstable on the surface (except near the poles) and no liquid water. However, recent glacier-like landforms have been identified in the tropics and mid-latitudes of Mars, an ice-rich mantling seems to cover both hemisphere above 60°lat., and recent gullies apparently carved by liquid-
Forget, François +4 more
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Surface conditions on Mars are currently cold and dry, with water ice unstable on the surface (except near the poles) and no liquid water. However, recent glacier-like landforms have been identified in the tropics and mid-latitudes of Mars, an ice-rich mantling seems to cover both hemisphere above 60°lat., and recent gullies apparently carved by liquid-
Forget, François +4 more
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