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Why are mineral bands in metamorphic rocks light and dark colored?
Wiki User
∙ 8y ago
Mineral bands are light and dark colored because they are different types of rock. In the rock cycle different types of rock can stack on top of each other, this can be subducted into the earth near the Mantle where there is enough pressure the rocks can start to melt and change. Because different types of rock metamorphose into different rocks you can have many layers in a type of rock. These can be light or dark colors depending on the rock.
Wiki User
∙ 8y ago
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If a rock has bands of light and dark layers it is?
It could be foliated metamorphic rock or sedimentary rock, depending on its mineral makeup and method of formation.
The metamorphic rock texture that has alternating bands of light and dark minerals is?
gneiss
If a rock has bands of light and dark layers it is what?
It could be a sedimentary rock or a foliated metamorphic rock exhibiting alternating bands of light and dark minerals.
Is this a description for gneiss rock can be made from granite wavy bands of dark and light layers?
Yes. This metamorphic rock can be made from granite; wavy bands of dark and light layers.
What mineral is most light-colored sand made of?
quartz sand
If a rock has bands of light and dark layers it is?
It could be foliated metamorphic rock or sedimentary rock, depending on its mineral makeup and method of formation.
The metamorphic rock texture that has alternating bands of light and dark minerals is?
gneiss
If a rock has bands of light and dark layers it is what?
It could be a sedimentary rock or a foliated metamorphic rock exhibiting alternating bands of light and dark minerals.
If a rock has bands of light and dark layers its what?
It could be a sedimentary rock or a foliated metamorphic rock exhibiting alternating bands of light and dark minerals.
Is this a description for gneiss rock can be made from granite wavy bands of dark and light layers?
Yes. This metamorphic rock can be made from granite; wavy bands of dark and light layers.
What mineral is most light -colored sand made of?
quartz sand
What mineral is most light-colored sand made of?
quartz sand
What rock has parallel bands of dark and light mineral grains?
It is a sedimentary rock
What is the segregation of light and dark colored minerals into thin layers or bands?
The term is foliation.
What are rocks called with alternating bands of light and dark silicate minerals?
They are probably gneiss, a banded metamorphic rock.
Contrast foliated and nonfoliated metamorphic rocks?
Foaliated rock can form in one or two ways. Extreme pressure may cause the mineral crystals in the rock to realign or regrow to form parallel bands. Foaliation also occurs as minerals that have different compositions separate to produce a series of alternation dark and light bands. Most nonfoliated metamorphic rocks share at least one or two main characteristics. First, the original rock that is metamorphosed may contain grains of only one mineral or contains very small amounts of other minerals.
What term is used to describe metamorphic rocks with a banded texture?
The two main groups of metamorphic rocks are foliated and non-foliated. Foliated metamorphic rocks show layering and parallel alignment of flat mineral crystals (ex. micas). The "banded texture in metamorphic rocks" is one of the specific kinds of foliated textures. It is referred to as gneissic banding. Essentially, this texture displays alternating layers of light and dark minerals. These rocks are called gneiss- the light bands form from quartz and feldspars, while the dark ones form from ferromagnesian minerals.
