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.
Large hydrothermal explosion craters shown with black dot and leader plus associated breccia deposits in Yellowstone National Park (locations from
Public Domain.
Morgan et al., 2017
