There is no record of the beginning of time in the Sangre de Cristo Range. Almost 3 billion years of Earth history are missing, but the rest is on spectacular display in this rugged mountain landscape. This is the geologic story of the Sangre de Cristo Range.
Additional publication details
USGS Numbered Series
The Geologic Story of Colorado's Sangre de Cristo Range
U.S. Geological Survey
Central Mineral and Environmental Resources Science Center