Bryan speaks to Dave Sharrow, hydrologist and natural resource manager at Zion National Park. Dave explains the erosion we see in Zion, which creates the spectacular, scenic canyons (2:16); the Colorado Plateau (7:06); hikes to see geological history (10:36); natural events, such as rock falls and flash floods (22:03); and what is happening to the cottonwood trees (30:10).

Resources:

Riverside walk https://www.citrusmilo.com/zionguide/riversidewalk.cfm

Kolob Terrace https://www.citrusmilo.com/zionguide/terrace.cfm

“Zions trees are dying of old age” http://www.deseretnews.com/article/865629369/Zions-trees-are-dying-of-old-age.html