Geologic Map of the Boulder Area
	Excerpted from "Boulder, A Sight to Behold: Guidebook" (1976) by Donald D. Runnells, modified by Sheila Murphy. Graphics adapted from Runnells by Erica J. Keefe.

Simplified geologic map of the Boulder Region. Patterns refer to different ages of rocks.

Additional Geology Information

• Geologic History of the Boulder Area
• The Geology of Mineral Resources in the Boulder Area
• A Geologic Cross Section of the Boulder Area
• Return to the Geologic Introduction to the Boulder Area

For more information about geology and mining in the Boulder area, see the BASIN bibliography.