the formation of something is a kind of process & if a process follows another process, then the other process begins that process ->  if the formation of something follows another process, then the other process begins the formation of that something  weathering is a kind of geologic process & erosion is a kind of process ->  weathering and erosion are kinds of processes  if the formation of something follows another process, then the other process begins the formation of that something & weathering and erosion are kinds of processes ->  if the formation of something follows weathering and erosion, then weathering and erosion begin the formation of that something  if the formation of something follows weathering and erosion, then weathering and erosion begin the formation of that something & in the rock cycle , formation of sediments follows weathering and erosion -> weathering and erosion begin the formation of sediments