Natural: Grand Canyon.
Man made: London bridge
1884 and 1914
Good luck!!!
Answer:
An alluvial fan is a triangle-shaped deposit of gravel, sand, and even smaller pieces of sediment, such as silt. This sediment is called alluvium. Alluvial fans are usually created as flowing water interacts with mountains, hills, or the steep walls of canyons.
Explanation:
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Dark matter makes up about 27% of the universe.
えなにおにいさんなにおにいさんはははは こんにちは