weathering is a kind of erosion & sediment is formed by rocks weathering ->  sediment is formed by weathering / erosion  weathering is a kind of geologic process & erosion is a kind of process ->  weathering and erosion are kinds of processes  weathering and erosion are kinds of processes & if something is formed by a process then that something is formed as a result of that process ->  if something is formed by weathering and erosion then that something is formed as a result of weathering and erosion  sediment is formed by weathering / erosion & if something is formed by weathering and erosion then that something is formed as a result of weathering and erosion -> sediment is formed as a result of weathering / erosion