| 词汇 | felsic |
| 释义 | felsic adjective uk /ˈfel.sɪk/ us /ˈfel.sɪk/ used to refer to rocks containing more light-coloured substances and aluminium than other rocks石英质的 Geology: types of rock agglomerate arenaceous arenite asthenosphere asthenospheric emery flinty gneiss intrusive lahar limestone lodestone magma marcasite marl marmoreal mudstone obsidian sandstone schist felsic | American Dictionaryfelsic adjective[ not gradable ] us/ˈfel·sɪk/ earth science describes rocks containing more light-colored substances and aluminum than other rocks Examples of felsicfelsic Crystallization proceeded to approximately the same stage in all orbicules, when the felsic shell started to form. This is in agreement with return to more mafic detritus and the proposed increased upper continental crust contribution, together at the expense of felsic detritus. The rise of felsic magma to a high level in the crust without degassing or neutralization of the melt volatile phase suggests deep faulting. In continental rift settings, the emplacement of such large volumes of felsic melts requires a huge amount of mafic magma derived from uprising asthenosphere. In general, eclogites are predominantly mafic and are preserved as boudins within felsic gneisses. To the south, the meta-gabbro is bounded by felsic gneiss. There is a continuum apparent between the amphibolites and intermediate gneisses, whilst the felsic gneisses form a separate, high-silica group. One or two extremely thin (< 0.2 mm) discontinuous mafic shells may occur in the felsic shell. The felsic granulites are fine- to medium-grained with granoblastic (granulitic) textures. Utilizing data for seven major elements, these are designed to discriminate between four main provenance groupings: mafic, intermediate, felsic and recycled quartzose. Relative rheology of coeval mafic and felsic magmas: nature of resulting interaction processes and shape and mineral fabrics of mafic microgranular enclaves. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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