Final answer:
The Loess Hills in Iowa can reach heights of up to 200-300 feet in some areas, due to material accumulation and erosion processes.
Step-by-step explanation:
Iowa's Loess Hills are noteworthy for their significant height due to the accumulation of windblown silt. In terms of their elevation, these features stand tall in the landscape and in some areas, they can reach heights of up to 200-300 feet.
This substantial height differential is attributed to both the accumulation of materials from adjacent uplands and the erosion processes at play in steeper, highland areas.