In the formation of metamorphic rocks, what effect do temperature and pressure primarily have? They erode rocks.
They create layers.
They make rocks smaller.
They change existing minerals..

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

hope this

what exactly is the question lol

answer///island,peninsula;