Mostrando 9,181 - 9,200 Resultados de 10,994 Para Buscar '"rock ', tiempo de consulta: 0.21s Limitar resultados
  1. 9181
    “…Compared to other supercontinents, relatively more Nb-bearing minerals, Y-bearing minerals, and zircons formed during Rodinian assembly, with corresponding enrichments of Nb, Y, and Zr concentrations in igneous rocks. By contrast, minerals bearing many other elements (e.g., Ni, Co, Au, Se, and platinum group elements) are significantly less abundant, without corresponding depletion of Ni and Co concentrations in igneous rocks. …”
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  2. 9182
    “…It is thought that the tesserae may be composed of silicic igneous rocks and that it may resemble proto-continental crust. …”
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  3. 9183
    “…Ilmenite-hematite solid solutions are common mineral systems in most mafic igneous and metamorphic rocks, and the compressive force in the rocks is generated by the high pressure in the upper mantle or by shock events with high pressure such as the collision of these rocks with meteorites. …”
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  4. 9184
    “…While there are now numerous records of dinosaurs from Cretaceous rocks around the state of Alaska, very few fossil records of terrestrial vertebrates are known from the Mesozoic rocks of the southwestern part of the state. …”
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  5. 9185
    por Talis, Vera L., Levik, Yuri S.
    Publicado 2016
    “…First block of LS and HS induced absolute error increase and matching arm velocity decrease in both groups, but in the second block of matching on rocking supports both arms velocity of elderly subject decreased and absolute error of elderly subjects toward the second block of rocking condition appeared lower than those of young subjects. …”
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  6. 9186
    “…The latter can facilitate large-scale fluid and mass transport in nominally impermeable rocks without large-scale fluid transport pathways. …”
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  7. 9187
    por Parsons, Ian
    Publicado 1994
    “…They are stable in the upper mantle, and are so abundant in the crust that they form the basis of the classification of igneous rocks. At the surface, feldspars weather to form clay minerals which are the most important mineral constituent of soils. …”
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  8. 9188
    “…This lays the material foundation for the formation of waxes during the maturation of hydrocarbon source rocks. The change of temperature and pressure conditions during the process of oil expulsion from source rocks and migration in the carrier bed will lead to phase fractionation and composition changes of oils, thus forming type A freezing point crude oils in the slope zone and type B freezing point oils in the depression zone. …”
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  9. 9189
    por Czech, Tadeusz
    Publicado 2022
    “…Iron and other metal compounds are the materials that often appear in coal seams, because they also appear as a component of former organic matter in coal rocks. Although iron is the dominant element in coal rocks, other metals such as titanium, lead, cobalt, nickel, and copper are also present. …”
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  10. 9190
    “…Scarce fossil tetrapod burrows have been recorded in Cretaceous rocks, which is probably linked to the dominant equable climates that existed for most of this period. …”
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  11. 9191
    “…The existence of ancient rocks in present mid-ocean ridges have long been observed but received less attention. …”
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  12. 9192
    “…Tectonic forces and surface erosion lead to the exhumation of rocks from the Earth’s interior. Those rocks can be characterized by many variables including peak pressure and temperature, composition and exhumation duration. …”
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  13. 9193
    “…We propose two possible models: one accounts for the coexistence, within the lower/intermediate crust, of large amounts of melts and cumulates besides country rocks. It implies a layered distribution of densities and, thus, a variation with depth of percentages of silicate liquids, cumulates and country rocks. …”
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  14. 9194
    por Moonpa, Kritsada, Motanated, Kannipa
    Publicado 2021
    “…Triassic carbonate rocks of Pha Kan and Doi Long Formations of Lampang Group consist mostly of carbonate successions deposited in the Sukhothai Zone, northern Thailand. …”
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  15. 9195
    “…Due to the fact that the surface is composed of granular soils and rocks of various sizes, contemporary rovers can have difficulties in moving on soft soils and climbing over rocks. …”
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  16. 9196
    por CERN PhotoLab
    Publicado 1956
    “…Check of the horizontal upper surface: note the rocking support (lower left)…”
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  17. 9197
    “…The ultramafic rocks are composed mainly of dunite and harzburgite, which are variably serpentinized. …”
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  18. 9198
    “…The characteristics of rocks collected from the borehole in Siete Cañadas area (EMD) were compared with petrography of coaly shales from La Cumbre in the Northern Mining District (NMD). …”
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  19. 9199
    “…The main contribution of this study is to provide an alternative methodology to detect rocks in planetary images because most of the previous works only focus on classification problems and used handmade feature vectors.…”
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  20. 9200
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