The massive Lake Bonneville flood is believed to have occurred between 14,000 and 15,000 years ago. Researchers estimated that water flowed at 15 million cubic feet per second when it happened.

Geologist Shawn Willsey talks about the Bonneville Flood March 14 while the Snake River erodes the 2 million-year-old basalt at the old Interstate Bridge near Auger Falls Heritage Park.

The pre-flood channel from King Hill to downstream of Glenns Ferry is now filled with a thick deposit of black basaltic sand left by the Bonneville Flood. But not all the topography in this area ...

A new study suggests that the Great Salt Lake was formed by tropical rainfall, not from Pacific storms as was previously thought.