2021 UPDATE ON U.S. NATIONAL PARK SERVICE INITIATIVES TO PROMOTE GEOLOGIC HERITAGE SITES AMONG FEDERAL, STATE AND LOCAL SITES AND THE CONCEPT OF AN OFFICIAL REGISTER
CONNORS, Tim, National Park Service, Geologic Resources Division, Post Office Box 25287, Denver, CO 80225 and WOOD, Jim, Department of Interior, National Park Service, Geologic Resources Division, 12795 West Alameda Parkway, Denver, CO 80225