Results 231 to 240 of about 35,748 (276)
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Nature Geoscience, 2010
The amount of pore space in most unweathered granite is too small to support a plant-based ecosystem. But porosity grows as intact rock interacts with surface waters beneath the soil.
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The amount of pore space in most unweathered granite is too small to support a plant-based ecosystem. But porosity grows as intact rock interacts with surface waters beneath the soil.
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Surface regolith and environment of comets
Planetary and Space Science, 1994Abstract A model for the formation of regolith at cometary surfaces is proposed which is based on the observational fact that comet nuclei release particles with sizes in the micrometre to the decimetre range. The particle emission mechanism is appropriated not only to accelerate particles to escape velocity, but also to “launch” them into orbits ...
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1990
Abstract The lunar regolith consists of the fragmental unconsolidated mantle which overlies more consolidated or crystalline rocks at the surface of the moon. The thickness of the regolith ranges from a few meters in some areas overlying mare basalt flows to tens of meters over much of the highland terrain.
David S. McKay, D.W. Ming
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Abstract The lunar regolith consists of the fragmental unconsolidated mantle which overlies more consolidated or crystalline rocks at the surface of the moon. The thickness of the regolith ranges from a few meters in some areas overlying mare basalt flows to tens of meters over much of the highland terrain.
David S. McKay, D.W. Ming
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Evidence of space weathering in regolith breccias I: Lunar regolith breccias [PDF]
Meteoritics & Planetary Science, 2005 Abstract— We have analyzed a suite of lunar regolith breccias in order to assess how well space weathering products can be preserved through the lithification process and therefore whether or not it is appropriate to search for space weathering products in asteroidal regolith breccia meteorites.
Sarah K. Noble +2 more
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Regolith research in Australia
Australian Journal of Earth Sciences, 2017Regolith science is a multidisciplinary, comparatively recent field, having evolved from several older disciplines: geology, geomorphology, soil science, and geography.
M. Thomas, Vanessa N.L. Wong
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Sedimentary associations and regolith
2010Sediments and sedimentary rocks as hosts to giant metallic deposits have already been invoked in several earlier chapters like oceanic sediments (Chapter 5); sediments in island arcs and Andeantype continental margins (Chapters 5 and 6, respectively), sedimentary rocks in the volcanosedimentary orogens (Chapter 9) and in early Precambrian greenstone ...
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Evaluations of lunar regolith simulants
Planetary and Space Science, 2016Apollo lunar regolith samples are not available in quantity for engineering studies with In-Situ Resource Utilization (ISRU). Therefore, with expectation of a return to the Moon, dozens of regolith (soil) simulants have been developed, to some extent a result of inefficient distribution of NASA-sanctioned simulants.
Taylor, Lawrence A. +2 more
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Dome Pressurization and Regolith Porosity
Earth and Space 2014, 2015Long term settlement of lunar or Mars caves or subsurface features on planetary bodies where large pit openings exist provide an opportunity to substantially increase livable volume areas and allow inhabitants freedom from confines of living in modules or enclosed in a cave environment.
E. L. Patrick +3 more
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On the depth of the lunar regolith
The Moon, 1970The aim of this paper is to point out that if the sinuous rilles on the Moon represent trenches in the mare ground in which they meander, the existence of a great number of individual boulders on their slopes - as discovered on the high-resolution photographs taken by US Lunar Orbiters 4 and 5 in 1967 - suggests that the solid substrate of the lunar ...
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Thermophysical Analysis of Regolith on (101955) Bennu: The Coarse Regolith Conundrum
Thermophysical analyses of planetary bodies such as the Moon, Mars, and numerous asteroids have allowed for remote estimates of regolith physical properties, such as particle size and packing density, as well as the relative spatial abundance of boulders.  Here we define “regolith” as a particulate assemblage where most ...Andrew Ryan +12 more
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