About the Author

Felicie Williams started learning about Colorado�s geology at a young age when she accompanied her geologist parents during summer field seasons. She earned a bachelor�s degree in geology from the University of Colorado in Boulder and a master of science in geology from the University of British Columbia. Felicie worked for years as a mineral exploration geologist and detailed mapper for mining companies and the Colorado Geological Survey. Halka Chronic received a doctorate in geology from Columbia University in 1949. Her career took her all over the globe�from teaching at Haile Sellassie University in Ethiopia to identifying Geologic Landmarks for the U.S. National Park Service in the southern Rockies. She spent more than thirty years in Boulder, Colorado, working as an editor and raising her daughters.