What happens to landforms when an area experiences isostatic rebound?

What happens to landforms when an area experiences isostatic rebound?

• A. They sink further into the water
• B. They rise and become elevated
• C. They erode rapidly
• D. They become submerged

Answer: (B)

When an area experiences isostatic rebound, the landforms rise and become elevated. This phenomenon occurs when large ice sheets that have depressed the Earth's crust begin to melt or recede, allowing the lithosphere to rebound to its original position. As the weight of the ice decreases, the crust slowly rises due to a process known as isostasy, which is the balance of the Earth's crust floating on the semi-fluid mantle beneath it. This uplift can take thousands of years, and the rate of rebound can vary depending on the size and thickness of the ice sheet that had previously pressed down on the land. The evidence of isostatic rebound is often observable in regions that were formerly covered by glaciers, where features like raised beaches and uplifted landforms can be identified. The process significantly alters the landscape and can affect ecosystems, sea levels, and human activities in these areas, making the understanding of isostatic rebound critical in geographical and environmental studies.

When an area experiences isostatic rebound, the landforms rise and become elevated. This phenomenon occurs when large ice sheets that have depressed the Earth's crust begin to melt or recede, allowing the lithosphere to rebound to its original position. As the weight of the ice decreases, the crust slowly rises due to a process known as isostasy, which is the balance of the Earth's crust floating on the semi-fluid mantle beneath it.

This uplift can take thousands of years, and the rate of rebound can vary depending on the size and thickness of the ice sheet that had previously pressed down on the land. The evidence of isostatic rebound is often observable in regions that were formerly covered by glaciers, where features like raised beaches and uplifted landforms can be identified. The process significantly alters the landscape and can affect ecosystems, sea levels, and human activities in these areas, making the understanding of isostatic rebound critical in geographical and environmental studies.