There are several that are well known but one that is often missed. There is a path straight from magma to sediment. I am speaking of volcanic ash. Magma erupts and immediately rains down and becomes sediment. read more
one starts at igneous rock and goes through metamorphism and becomes a metamorphic rock. another is a sedimentary rock goes through melting and becomes magma . read more
Erosion carries away fragments of rock. Eventually, the moving water or wind slows and deposits the sediment. Deposition is the process in which a sediment settles from water or wind carrying it. After sediment has been deposited, the process of compaction and cementation change the sediment into a sedimentary rock. read more