Geologic Cross Section 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 and generalized cross section east-west across the Boulder area. The thicknesses are not to scale, and the vertical scale is exagerated for emphasis.

Additional Geology Information

• Geologic History of the Boulder Area
• The Geology of Mineral Resources in the Boulder Area
• A Geologic Map 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.