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 Geologic map of an area near York Mountain, San Luis Obispo County, California

Geologic map of an area near York Mountain, San Luis Obispo County, California

URI: https://pubs.usgs.gov/publication/i1369

Display as: