What term is used for large hollows that dip to a central point and are surrounded by higher ground?

The term "basins" refers to large depressions in the earth's surface that are lower than the surrounding areas, often forming a bowl-like shape. They are characterized by their central point, which is the lowest point within the basin, and are surrounded by higher elevations. Basins can be formed through various geological processes, including erosion, sedimentation, or tectonic activity.

This definition aligns with the characteristics of basins, distinguishing them from deltas, which are landforms created by the deposition of sediment at the mouth of a river; tundras, which are cold, treeless regions typically found in polar areas; and plateaus, which are flat elevated areas of land that rise sharply above the surrounding terrain. Understanding these distinctions helps reinforce the unique nature of basins in geography.