Arthur's Pass National Park, New Zealand Trip Day Twenty-seven: Friday, October 19, 2007 Great Alpine Highway Waimakarini Gorge Rocks At The Top Usually when you see a field of rocks like this, you see something higher nearby where the rocks came from. When the forces of erosion, ice, water, and wind break a large formation apart, the pieces fall by the force of gravity. So, it's not uncommon to see a field of rocks below a cliff, for example. But where did these rocks come from? This hill was the highest place around. Our guess is that there once was something much higher nearby. Or, that a nearby volcano vaulted them here during an erupution.

These were probably uncovered where they lay.

Big Slab Was Undercut

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