| 词汇 | igneous |
| 释义 | igneous adjective geology specializeduk /ˈɪɡ.ni.əs/ us /ˈɪɡ.ni.əs/ (of rocks) formed from magma (= very hot liquid rock that has cooled)（岩石）火成的 Geology: types of rock agglomerate arenaceous arenite asthenosphere asthenospheric emery flinty gneiss haematite indurated intrusive lahar limestone lodestone magma marl marmoreal obsidian sandstone schist igneous | American Dictionaryigneous adjective[ not gradable ] us/ˈɪɡ·ni·əs/ earth science describes rocks made from magma (= liquid rock) that has cooled and become solid Examples of igneousigneous The granular cause of igneous fabrics is often complex and the magnetic lineation cannot invariably be linked to flow direction. We tested one greywacke and three igneous compositions as contaminants. Primary hornblende is commonly partially replaced by fine decussate biotite indicative of some static recrystallization, although plagioclase retains igneous zoning. All divisions exhibit igneous layering on a variety of scales. The preservation of abundant igneous plagioclase, however, indicates that the body largely failed to equilibrate at eclogite-facies conditions. These coarse-grained patches are igneous in origin and grade into finer-grained gabbro at the edges. Igneous lithologies vary from diorite through granodiorite, and granite to pegmatitic granite. For the geologist, these two plume types are identified respectively with the large igneous province, and the hotspot trail. Examples of fluid-mineral-rock interactions in sedimentary, igneous (including oceanic) and metamorphic environments are discussed; methods of thermometry and effects of volatile loss are reviewed. The book is divided into 13 chapters based on igneous processes. The book is structured by subdivision into igneous activity characteristic of different tectonic environments. 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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