What igneous rock can form gneiss?
The igneous rock may be eroded, the resulting sediment will be deposited and form a new sedimentary rock, such as a sandstone or mudstone. If it gets buried and is subjected to high pressure and temperature new minerals will form, and the colour and texture of the rock will change. It will have become a metamorphic rock, probably a gneiss (depending on conditions). Or it could melt and then re-solidify as another igneous rock.
Yes. A number of metamorphic rocks are formed from igneous and other metamorphic rocks. In fact there is a sequence of metamorphic rocks that starts with the sedimentary rock, shale. Shale metamorphoses into slate, which in turn can become phyllite, which can become schist, which can become gneiss. Gneiss can also form by metamorphosing granite, which is an igneous rock.
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…
When subjected to heat and pressure shale metamorphoses into slate. Then slate into phyllite, phyllite into shist, and finally shist into gniess. Gniess is the final form. It has light and dark layers. Alternatively, gneiss may alos form when granite or a similar igneous rock is subjected to great heat and pressure.
As describe by the rock cycle, an igneous rock can undergo three types of changes. First, it can be weathered and then compacted into a sedimentary rock, such as obsidian weathered into shale. Next, an igneous rock can, through heat and pressure, be changed into a metamorphic rock. Granite, which is an igneous rock, can be metamorphosed into gneiss. Finally, an igneous rock can be be melted and then cooled into another igneous rock. For…