Gneiss is a metamorphic rock. It is formed form another metamorphic rock called schist (sh-ist). Schist is formed form fine grained sedimentary rock (often shale). While gneiss is formed by great pressure from moving plates of the earth's crust.
Granite.
They are both metamorphic rocks. One difference is the rocks they are formed from. Gneiss is formed from Feldspar and Quartz. Gneiss can also contain muscovite, biotite and hornblende. Quartzite is formed from sandstone. Also Gneiss is more intensely foliated than Quartzite. This can be seen in the bands formed in Gneiss, while quartzite has no bands. Pure quartzite is white, while Gneiss is grey or pink, with dark streaks.
Gneiss is a metamorphic rock formed from either igneous or sedimentary deposits.
Gneiss is a metamorphic rock that is formed when heat and pressure is applied to an igneous or sedimentary rock. The old rock does not melt completely but reorganizes it's minerals to form banks of foliation giving it the light/dark bands. Gneiss is formed when you have a parent rock that is rich in silica. Since most of the continental crust is silica rich, gneiss it a common rock. It is the highest grade of metamorphic rock in the metamorphic sequence. The sequence goes like this: slate - schist - phyllite - rock.
Four rocks formed by metamorphic grade are slate, phyllite, schist and gneiss. Slate and pnyllite are low grade; schist is a medium grade; and gneiss is a high grade rock.
Gneiss may come from either granite or schist.
Gneiss can be formed by the metamrphism of either granite or schist.
Gneiss
Gneiss which is formed frm the metamorphism of ignous rock is known as orthogneiss and gneiss which is formed from the metamorphism of sedimentary rocks is known as paragneiss.
They are both metamorphic rocks. One difference is the rocks they are formed from. Gneiss is formed from Feldspar and Quartz. Gneiss can also contain muscovite, biotite and hornblende. Quartzite is formed from sandstone. Also Gneiss is more intensely foliated than Quartzite. This can be seen in the bands formed in Gneiss, while quartzite has no bands. Pure quartzite is white, while Gneiss is grey or pink, with dark streaks.
Gneiss.
gneiss
Slate,schist,gneiss are the metamorphic rock formed from mudstone.
Gneiss is a metamorphic rock formed from either igneous or sedimentary deposits.
Heat And Pressure
Hornfels or gneiss are possible metamorphic rock with a greywacke protolith.
Heat And Pressure
Metamorphic, because it is formed with heat and pressure