Question

Which statement best describes how the Loess Bluffs were created?

O The bluffs were built as an effort to stop erosion.
Sediment carried by rivers accumulated over the course of thousands of years...
O Windblown dust accumulated over the course of millions of years.
O Loamy soil and limestone were incorporated over an extended period.

Answer 1

The correct answer is Windblown dust accumulated over the course of millions of years.

The Loess Bluffs were formed when windblown dust accumulated over the course of millions of years. The dust was carried by strong winds from the western plains and deposited in the eastern United States. The dust was so fine that it could be carried long distances, and it accumulated to depths of up to 100 feet in some places. The Loess Bluffs are a unique and fragile landscape, and they are important for their biodiversity and their role in preventing erosion.

The other options are incorrect. Option A is incorrect because the Loess Bluffs were not built as an effort to stop erosion. Option B is incorrect because the sediment was not carried by rivers. Option C is incorrect because loamy soil and limestone were not incorporated into the Loess Bluffs.