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gneiss    音标拼音: [n'ɑɪs]
n. 片麻岩

片麻岩

gneiss
n 1: a laminated metamorphic rock similar to granite

Gneiss \Gneiss\ (n[imac]s), n. [G.] (Geol.)
A crystalline rock, consisting, like granite, of quartz,
feldspar, and mica, but having these materials, especially
the mica, arranged in planes, so that it breaks rather easily
into coarse slabs or flags. Hornblende sometimes takes the
place of the mica, and it is then called {hornblendic gneiss}
or {syenitic gneiss}. Similar varieties of related rocks are
also called gneiss.
[1913 Webster]


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  • Gneiss - Wikipedia
    Gneiss ( naɪs NYSE) is a common and widely distributed type of metamorphic rock It is formed by high-temperature and high-pressure metamorphic processes acting on formations composed of igneous or sedimentary rocks This rock is formed under pressures ranging from 2 to 15 kbar, sometimes even more, and temperatures over 300 °C (572 °F) Gneiss nearly always shows a banded texture
  • Gneiss: Metamorphic Rock - Pictures, Definition More
    Gneiss is a foliated metamorphic rock identified by its bands and lenses of varying mineral composition Some of these bands (or lenses) contain granular minerals that are bound together in an interlocking texture
  • Gneiss | Classification, Composition, Characteristics, Formation, Uses
    Gneiss is a foliated metamorphic rock that is a common distribute type of rock high-grade regional metamorphic approaches from pre-current formations that have been initially both igneous or sedimentary rocks
  • Gneiss: Formation, Types, Composition, Uses - Geology In
    Gneiss is a foliated metamorphic rock that is characterized by its banded appearance The bands are composed of different minerals, which are aligned in parallel layers Gneiss is formed by the high-temperature and high-pressure metamorphism of igneous or sedimentary rocks Gneiss Gneiss pronounced "nais," ( naɪs NICE) is a high-grade metamorphic rock characterized by its gneissic banding
  • Gneiss: Exploring This Rock Type and Its Characteristics
    Gneiss is a high-grade metamorphic rock known for its pronounced banding and layered appearance This banding results from the high-temperature and high-pressure conditions under which it forms, where original rock minerals recrystallize and segregate into alternating light and dark layers Gneiss originates from pre-existing igneous or sedimentary rocks such as granite, diorite, and shale
  • Gneiss | Metamorphic, Foliated Banded | Britannica
    Gneiss, metamorphic rock that has a distinct banding, which is apparent in hand specimen or on a microscopic scale Gneiss usually is distinguished from schist by its foliation and schistosity; gneiss displays a well-developed foliation and a poorly developed schistosity and cleavage For the
  • Granite vs Gneiss: The Difference Between Gneiss and Granite
    Granite and gneiss are both types of rocks that belong to the category of igneous and metamorphic rocks, respectively The geological study of granite and gneiss entails a meticulous examination of their respective textures, formations, mineral compositions, geographical distributions, distinguishing features, and applications
  • Gneiss: Identification, Characteristics, and More - Rockhound Resource
    Gneiss is part of a continuum of metamorphic rocks, beginning at slate and ending with gneiss As a rock is metamorphosed, it first changes into slate and then grades into phyllite, which grades into schist, which grades into gneiss
  • Gneiss: The Banded Metamorphic Rock - Rockhounding Wiki
    Gneiss is a high-grade metamorphic rock characterized by its distinctive banding and foliated structure, formed from the recrystallization of pre-existing rocks such as granite or sedimentary rocks like shale
  • Gneiss Rock Type, Color, Texture, and Uses (Expert Guide)
    Gneiss rock texture is a type of metamorphic foliation describing parallel bands of alternating (light and dark) minerals with a poorly developed schistosity The mineral grains in the stone are coarse and visible to our naked eye





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