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.
Slabby front of stream shown above. Lava pushes plates of crust to advance flow front. Width of view, 2-3 meters
Public Domain.
