Skip to main content
U.S. flag

An official website of the United States government

Geologic map of the Timber Hill basalt Sweetwater Hills, Montana

April 2023 (approx.)

Detailed Description

Simplified geologic map of the Timber Hill basalt and underlying geology in the Sweetwater Hills. The Sweetwater Road is shown by red. Note the basalt flow generally rests on poorly cemented sediments of the Sixmile Creek Formation shown in orange.  Map by Jesse Mosolof (Montana Bureau of Mines and Geology).

Sources/Usage

Public Domain.

Was this page helpful?