June 22, 2010

Canyon carved in three days in Texas flood

This is amazing.  Science Daily reports Canyon Carved in Just Three Days in Texas Flood

In the summer of 2002, a week of heavy rains in Central Texas caused Canyon Lake -- the reservoir of the Canyon Dam -- to flood over its spillway and down the Guadalupe River Valley in a planned diversion to save the dam from catastrophic failure. The flood, which continued for six weeks, stripped the valley of mesquite, oak trees, and soil; destroyed a bridge; and plucked meter-wide boulders from the ground. And, in a remarkable demonstration of the power of raging waters, the flood excavated a 2.2-kilometer-long, 7-meter-deep canyon in the bedrock.

According to a new analysis of the flood and its aftermath -- performed by Michael Lamb, assistant professor of geology at the California Institute of Technology (Caltech), and Mark Fonstad of Texas State University -- the canyon formed in just three days.

A paper about the research appears in the June 20 advance online edition of the journal Nature Geoscience.

Posted by Jill Fallon at June 22, 2010 11:26 AM | Permalink