Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Colorado River terrace gravels rest unconformably on an old erosional surface on the Navajo Sandstone. This view is of the Colorado River Valley north and east of Glen Canyon Dam as seen from the Wahweap Overlook.
Public Domain.
