What is the origin of smooth troughs (T on this figure) cutting across the landscape in the Great Lakes area?
A. Glaciers carved the smooth troughs.
B. A huge flood coming from Iowa flowed toward the Great Lakes.
C. The areas were covered by soft marine sediments.
D. All of these choices are correct.
Answer: A
You might also like to view...
Why might an organism such as Lingula show little evidence for change over great amounts of geologic time? What
are these types of organisms called? What will be an ideal response?
After the Civil War, for many years the economy of the South continued to be primarily ________, and as a result, ________ immigrants came to the South than other parts of the United States
Fill in the blank(s) with correct word
Which of the following is the only substance that is found naturally in the atmosphere near the Earth's surface as a solid, a liquid, and a gas?
A. water B. carbon dioxide C. ozone D. molecular oxygen
Air which resists vertical displacements is considered to be stable. Indicate whether the statement is true or false