In China's mountainous south, geologists think they have discovered a new kind of explosive super landslide that gives no warning and jumps rivers in a single bound.

At least six of what they are calling mass ejection landslides were triggered by the great Wenchuan earthquake of 2008, and are thought to have launched whole mountainsides into the air at more than 160 miles per hour (250 kph), leaping over rivers -- not even stopping to dam them -- and crashing into the mountains on the opposite sides of their valleys.

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