Gneiss - Wikipedia, the free encyclopedia
|
|
Gneiss (pronounced /ˈnaɪs/ ) is a common and widely distributed type of rock formed by high-grade regional metamorphic processes from pre-existing formations that were originally either igneous...
en.wikipedia.org/wiki/Gneiss
|
|
|
The minerals bands in this specimen are just beginning to develop, but are distinctly separate from each other putting it in the gneissic category. This specimen is not far removed from a schist seen closeup (for example), but the megascopic banding here puts it in the gneiss category.
|
csmres.jmu.edu/geollab/Fichter/MetaRx/Rocks/gneiss1.htm...
csmres.jmu.edu/geollab/Fichter/MetaRx/Rocks/gneiss1.html
|
|
|
I urgently need this question to be answered. How ... Depending on their composition, they may also be called garnet gneiss, biotite gneiss, albite gneiss, etc. Orthogneiss designates a gneiss derived from an igneous rock, and paragneiss is one from a sedimentary rock.
|
answers.yahoo.com/question/index?qid=20071111193602AAzW...
answers.yahoo.com/question/index?qid=20071111193602AAzWVF5
|
|
|
ChaCha has the answer to this question: Why can the composition of gneiss vary but overall texture cannot Answer: The texture of gneiss is what defines it - if it varies, it's not g... ...MORE... ... The texture of gneiss is what defines it - if it varies, it's not gneiss. But this texture can be formed by different minerals.
|
www.chacha.com/question/why-can-the-composition-of-gnei...
www.chacha.com/question/why-can-the-composition-of-gneiss-vary-but-overall-texture-cannot
|
|
|
Gneiss is a metamorphic rock form characterized by banding caused by segregation of different types of rock, typically light and dark silicates. Rather than an indication of specific mineral composition, the term is an indication of texture.
|
hyperphysics.phy-astr.gsu.edu/Hbase/Geophys/gneiss2.htm...
hyperphysics.phy-astr.gsu.edu/Hbase/Geophys/gneiss2.html
|
|
Geology question: What is the mineral composition of gneiss? feldspar and quartz ... What is Gneiss' mineral? What is gneiss composition? What is the composition for gneiss? What is gneiss's mineral composition? What the mineral composition of slate? What is the mineral composition gneiss? What mineral is present in...
|
wiki.answers.com/Q/What_is_the_mineral_composition_of_g...
wiki.answers.com/Q/What_is_the_mineral_composition_of_gneiss
|
|
The mineralogy of a particular gneiss is a result of the complex interaction of original rock composition, pressure and temperature of metamorphism, and the addition or loss of components.
|
geology.csupomona.edu/alert/metamorphic/gneiss.htm
geology.csupomona.edu/alert/metamorphic/gneiss.htm
|
|
Metamorphic rocks are created when existing igneous or sedimentary rocks are squashed, stretched and/or cooked and change their appearance and mineral composition. Examples: gneiss, quartzite, slate, mica schist, marble.
|
www.francesjane.com/mineralnoframes.html
|
|
gneiss , coarse-grained, imperfectly foliated, or layered, metamorphic rock . Gneiss is characterized by alternating light and dark bands differing in mineral composition and having coarser grains than those of schist.
|
www.encyclopedia.com/doc/1E1-gneiss.html
www.encyclopedia.com/doc/1E1-gneiss.html
|
|
