When the roof of a natural arch collapses, the resulting rock pillar left standing in the sea is called_____?
Answer Details
When the roof of a natural arch collapses due to the continuous erosion of the sea waves, the remaining rock pillar left standing in the sea is called a "stack". A stack is a geological landform that is formed as a result of erosion caused by the sea waves on the coast. These waves erode the softer rocks and cause the collapse of the roof of a natural arch, leaving a tall, vertical rock pillar that stands out from the sea. Over time, these stacks may also erode and eventually collapse, leaving behind a stump or a rocky platform.