Skip to main content
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

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.

Google Analytics Dashboard for Comment on “Apatite 4He/3He and (U-Th)/He Evidence for an Ancient Grand Canyon”

Comment on “Apatite 4He/3He and (U-Th)/He Evidence for an Ancient Grand Canyon”

URI: https://pubs.usgs.gov/publication/70193248

Display as: