Final answer:
An example of a mature desert landscape feature consisting of coalesced all-uvial fans is Death Valley National Park in California. All-uvial fans are triangular-shaped sedimentary deposits composed of all-uvium. In Death Valley, the all-uvial fans have coalesced over time, creating a mature desert landscape.
Step-by-step explanation:
An example of a mature desert landscape feature that consists of coalesced all-uvial fans is the Death Valley National Park in California. Death Valley is located in an arid region and is known for its all-uvial fans, which are fan-shaped deposits formed by moving water.
All-uvial fans are triangular-shaped sedimentary deposits composed of all-uvium, which is a mixture of gravel, sand, silt, and/or clay. They are typically found in arid or semi-arid regions where the energy of the water is high enough to create these fan-shaped deposits. In Death Valley, the all-uvial fans have coalesced over time, resulting in a mature desert landscape feature.
The formation of all-uvial fans is influenced by the topography of the area, the climate, and the characteristics of the sediment being transported by the water. In Death Valley, the all-uvial fans are formed by mountain streams that deposit sediment as they slow down and split into many channels. Over time, these fan-shaped deposits merge together to form the coalesced all-uvial fans that are characteristic of the mature desert landscape in Death Valley National Park.