Discover Earthのインスタグラム(discoverearth) - 10月22日 04時00分

Impressive, right?
"Grand Falls is a natural waterfall system located 30 miles northeast of Flagstaff, Arizona in the Painted Desert on the Navajo Nation.
At 185 feet (56 meters) tall, it is taller than Niagara Falls. It dumps snow melt or seasonal rain into the Little Colorado River below. It is known for its extremely muddy flow, which is a major contributor to Little Colorado River opacity. Heavy rains or snow melt will produce spectacular viewing, photography and sound whereas the scarcity of water will produce only trickles or no flow at all.
Grand Falls was formed when lava from nearby Merriam Crater flowed into the Little Colorado River, creating a lava dam. The river was forced to reroute itself around the dam and Grand Falls formed where the river rejoins its original course."
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