What is the concept of isostatic?

Isostatic refers to the equilibrium of the Earth's crust and its ability to maintain balance under varying loads, such as mountains or ice sheets. This concept is based on the principle of isostasy, which posits that the lithosphere floats on the more fluid asthenosphere, adjusting its position in response to weight changes. When loads are added or removed, such as through erosion or melting glaciers, the crust responds by rising or sinking to restore equilibrium. This phenomenon is crucial for understanding geological processes and landform evolution.