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.
The continuum at the top shows how grain sizes are categorized – greater than 50% of the sediments in a debris flow are in the categories from sand all the way up to boulders.
Public Domain.
