121K views · 1.9K reactions | When the Missoula floods surged into the Snake River, they backflooded 150 miles upstream, leaving fine silts at the distal reach. At the same time, the Bonneville flood thundered north through Hell’s Canyon, dropping massive boulders at its mouth. At Tammany Bar, the two torrents met —coarse Bonneville gravels overlying Missoula silts —a geological record of cataclysms colliding. | The Randall Carlson | Facebook

5.5K views · 1.1K reactions | Mega-floods aren’t mythology, they’re measured. The Bonneville Flood hit ~40 million cubic feet per second. The Missoula floods? Up to 400–800 million cubic feet per second. Water volumes so massive they carved canyons, moved boulders like pebbles, and reshaped whole regions in days. These weren’t rivers. They were planet-altering forces. | The Randall Carlson | Facebook