Deadman Canyon Alluvial Fan, Wassuk Range, Nevada.

Deadman Canyon Alluvial Fan, Wassuk Range, Nevada.

I am a professional geologic mapper employed by U.S. Geological Survey. My current project involves mapping and understanding the how, why, and when of the ~400 km (250 mi) reach of the lower Colorado River between Hoover Dam (near Las Vegas, Nevada) and Imperial Dam (near Yuma, Arizona). It is a big task, but it is not impossible.