An official website of the United States government
Here’s how you know
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.
Google Analytics Dashboard for Seawater as the source of minor elements in black shales, phosphorites and other sedimentary rocks
Seawater as the source of minor elements in black shales, phosphorites and other sedimentary rocks