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.
First of three images, showing tilted slab of crust and its demise. Excuse the raindrops on lens in first and second images. Extreme heat evaporated the water by third image time. 0546:59.
Public Domain.
