One way a segmented fan can be formed is that through an area of rapid tectonic uplift, streams will begin to steepen, which would result in the formation of younger and steeper fan segment.
Streams will begin to steepen. This is through an area of rapid tectonic uplift. One way is this. A segmented fan can be formed One way. Steepen would result in the formation of younger. Steepen would result in the formation of steeper fan segment.