premise: weathering is a kind of erosion sent2: sedimentary rocks are formed in layers sent3: sedimentary rocks are formed by deposition sent4: weathering is a kind of geologic process sent5: weathering / mechanical weathering means breaking down rocks / surface materials from a larger whole into smaller pieces by weather / mechanical means sent6: erosion causes deposition sent7: deposition is a kind of natural process sent8: the formation of sedimentary rock is a sequential process, with stages of weathering, erosion, deposition,burying, compaction.
hypothesis: a process in the formation of sedimentary rock is rock being broken down and then deposited in layers