Biotite is a form of Mica (dark/black mica) made from Mafic eruptions. It is often found embedded in Granite. Boitite can also be found in some varieties of Schists, and in some other metamorphic rocks.
Schist rock is a type of metamorphic rock that forms deep within the Earth's crust. The age of schist rock can vary widely, as it depends on when the rock was formed through the process of metamorphism. In general, schist rock can range in age from hundreds of millions to billions of years old.
The form of mica commonly found in rocks like gneiss, granite, and schist is biotite. Biotite is a dark-colored mineral belonging to the mica group, characterized by its perfect cleavage and shiny, reflective surface. It is a common accessory mineral in these rock types and can impart a distinctive sheen or glittery appearance.
A schist is a metamorphic rock.
Gneiss is a high grade metamorphic rock, the product of various rock types being exposed to intense pressures and heat under the surface of the Earth. Orthogneiss is a gneiss whose parent rock was igneous, and paragneiss is a gneiss whose parent rock was sedimentary.
The most common minerals in gneiss are quartz, potassium feldspar, and sodium feldspar. Smaller amounts of muscovite, biotite and hornblende are common. Gneiss can also form from gabbro or shale.
No, schist is a metamorphic rock type characterized by strong foliation, while mica schist is a specific type of schist that contains a high proportion of mica minerals like muscovite or biotite. Mica schist has a distinct shiny appearance due to the abundance of mica minerals.
To determine which rock type has a greater percentage of biotite, you would typically compare different igneous or metamorphic rocks known for their biotite content. For example, granite often contains less biotite compared to schist or certain types of gneiss, which can have a higher percentage of biotite due to their metamorphic processes. If you have specific rock types in mind, I can provide a more tailored comparison.
No, schist is a metamorphic rock type.
Biotite, muscovite, chlorite, talc, garnet, and kyanite are common in schist.
Schist is a high-grade metamorphic rock.
It is a folliated metamorphic rock.
schist
Biotite is most commonly found in igneous and metamorphic rocks. It can be found in granite, schist, and gneiss, among other rock types. Biotite is also often present in some sedimentary rocks, such as some sandstones.
Probably the metamorphic rock phyllite.
The mineral responsible for the strong foliation in schist is usually mica (such as biotite or muscovite). These minerals have a planar structure that aligns during the metamorphic process, creating the foliation planes in the rock.
Schist is a type of rock that is metamorphic. It can be found all around North and South America, as well as Europe.
Schist is a metamorphic rock.