Flood

Interesting news from Ars Technica and Science News:

"Over the course of just a few days, the flood barreled through limestone-rich bedrock, carving out 1.2km of canyon with an average depth of over seven meters, and as deep as 12m in some spots. Below that region, the gorge opens up into another kilometer that's a bit more like an alluvial valley, with winding channels spread over a wider space. "

"Water rushing through the dam’s emergency spillway carved a 2.2-kilometer-long canyon downstream of the spillway in just three days"

"It is difficult to identify morphologic features in Canyon Lake Gorge that indicate canyon formation during a three day event, versus a longer-lived flood or multiple events"

"It doesn’t take millions of years to create an impressive channel," Howard notes. "Flowing liquid can do a lot of work in a short period of time."