Highwall mining is often used when excavating an open-pit mine becomes too expensive. There are many advantages over underground mining, including the fact that it is both more cost-effective and involves less lead time.
The erosion events that are caused by gravity are :
<h3>What is erosion and how did gravity cause erosion?</h3>
Erosion can be regarded as the washing away of the top soil by the agent of erosion such as wind or water or man.
However, gravity can play a role in the erosion process by moving the earth materials and draw them from the higher elevations till the lower elevations.
learn more about erosion at ;brainly.com/question/17905503
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