The Alluvial Fan didn’t even exist until 1982, when a manmade dam 6 miles up the Roaring River failed, sending huge rocks and boulders crashing down the valley and leaving a massive pile of them ...

We discovered 113 river avulsion events in temperate, tropical and dry climates. Of these events, 33 were on alluvial fans. These land forms develop when rivers flow out of mountains or canyons ...

At first the rift valley will be dominated by river systems, including these environments: alluvial fans, river channels and floodplains. The rift valley may fill with fresh water and become a lake.

What remains today at Alluvial Fan are giant boulders carried down by that flood. Sand and other debris is spread out in all directions. A strong river of water flowing from above is still swift ...