Here's why:
* Isostasy: Continental crust floats on the denser mantle, much like an iceberg floats in water. This balance is called isostasy. The thicker the crust, the deeper it extends into the mantle to achieve equilibrium.
* Density Difference: Continental crust is less dense than the mantle. The thinner the crust, the less mass it has pressing down on the mantle.
* Pressure and Depth: A thicker crust exerts greater pressure on the mantle, causing it to sink deeper. Conversely, a thinner crust would exert less pressure, leading to shallower penetration into the mantle.
In summary: A thinner continental crust would exert less pressure on the mantle, resulting in less depression of the mantle. This would affect the overall topography of the region, potentially making the landforms less mountainous and more subdued.
