The presence of which of the following geological features provides the best evidence that glaciers once covered an area?
A B C D
wide riverbeds U-shaped valleys underground caves groundwater springs
Question: The presence of which of the following geological features provides the best evidence that glaciers once covered an area?
(A) wide riverbeds
(B) U-shaped valleys
(C) underground caves
(D) groundwater springs

Answer: (B) U-shaped valleys
Answer: (C) underground caves
Question: The presence of which of the following geological features provides the best evidence that glaciers once covered an area?
(A) wide riverbeds
(B) U-shaped valleys
(C) underground caves
(D) groundwater springs
Answer: (B) U-shaped valleys