Weathering is a slow process. It takes thousands of years to erode a rock or land mass. This is going on today with our beaches and the rocks in the ocean.
The answer is D. The Palaeozoic era was characterized by the supercontinent of Pannotia which was located at the current position where Chile is, 500 million years ago. There is evidence that shows that central Africa was once at the polar regions due to evidence of glaciers in its geological rocks. Due to tectonic movement, the Appalachians and the Ural Mountains were formed in the resulting Pangea supercontinent.
Answer: Hanging valleys and waterfalls.
Explanation:
The time or period of the maximum glacial advance, Yosemite Valley was filled with a very big truck of glacier. Little tributary glaciers flowed down adjacent valleys and joined into the trunk. When the glaciers returned, the trunk glacier had cut a very deeper valley than the tributary glaciers, becoming hanging valleys where the tributary glaciers merged the trunk. Today in Yosemite National park, we can see evidence of glacier from the hanging valleys and waterfalls.
This is an example of a closed system