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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
    In traditional English and North American usage, a gneiss is a coarse-grained metamorphic rock showing compositional banding (gneissic banding) but poorly developed schistosity and indistinct cleavage
  • Gneiss: Metamorphic Rock - Pictures, Definition More
    What Is Gneiss? 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 It has a glorious banding which is apparent on microscopic scale and hand specimen
  • 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
  • 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: Exploring This Rock Type and Its Characteristics
    A gneiss is defined as a banded metamorphic rock generated from either a sedimentary or an igneous rock, and is composed of feldspar, quartz, mica, or hornblende, and is coarse enough that the constituent minerals can be recognized by the eye
  • Gneiss: Characteristics, Formation and Identification - Sandatlas
    Gneiss is a coarse-grained metamorphic rock in which most mineral grains are visible without magnification Its hallmark is gneissic banding – alternating light and dark layers produced by mineral segregation during high-temperature deformation
  • Gneiss: The Banded Metamorphic Rock - Rockhounding Wiki
    Explore the world of gneiss, a durable and visually striking metamorphic rock known for its distinctive banding Learn about its formation, types, uses in construction and design, and how to care for this timeless stone in our detailed guide
  • Gneiss: Mineral information, data and localities.
    A medium- to high-grade metamorphic rock that commonly has a banded structure and is generally medium- to coarse-grained with poorly developed schistosity
  • What Kind of Rock Is Gneiss and How Does It Form?
    Gneiss is a durable and hard rock, comparable to granite, making it suitable for various practical applications Its resistance to weathering and ability to withstand heavy use make it a popular choice in construction and landscaping





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