Sunday, April 15, 2018
Mysterious Front Range Gravels
Cal Ruleman (USGS) and Bob Raynolds (Denver Museum of Nature and Science)
September 8-9, 2018
Geology of the Upper Arkansas Valley
Cal Ruleman (USGS) and Karl Kellogg (USGS, Emeritus)
In collaboration with RMAG
See our Past Field Trips for other places and topics we have explored.