,how did the ice age affect the landscape of Snowdonia?

On the summit of Snowdon, fossilized shell fragments showed this rock was on the seafloor some 500 million years ago. During the last ice age, glaciers reshaped the landscape by excavating many of the park's valleys about 18,000 years ago.

Explanation:

On the summit of Snowdon, fossilized shell fragments showed this rock was on the seafloor some 500 million years ago. During the last ice age, glaciers reshaped the landscape by excavating many of the park's valleys about 18,000 years ago.

crop rotation kepy different plants in the soil instead of once constintly. when switching out plants you have different nutrients being absorbed at different speeds and different roots growing differently therfore the spoil and water flow have to adapt and carry fresh nutrients to carry the constant changes that were going on in the soil.

rosevelt. 1973. "slaves everywhere"