December 2025 THE MOUNTAIN GEOLOGIST, VOLUME 62, NUMBER 3
December 2025, THE MOUNTAIN GEOLOGIST, VOLUME 62, NUMBER 3
Geologic Map of the Shell Reservoir 7.5-minute quadrangle, Bighorm and Sheridan counties, Wyoming
Santosh Adhikari, Jeniffer Gifford
181
He:N2 Rations of Gases and What They Can Tell Us About Basement Generating Capacity of Helium: Clues from New Mexico
Ronald F. Broadhead
199
Permian Tsunami Deposits Across the Eastern Colorado Plateau
Richard J. Brose
215
Geochronology and Geomorphic Evolution of Beebe draw: Insights into the Ancestral South Platte River and the Colorado Piedmont
Alexander E. Marr
223
MEMBER ALERT. The December 2025 issue of The Mountain Geologist will be removed from the RMAG website approximately August 31, 2027. If you wish to download this issue, you must do so before this date.
Programing Note - In 2025 the RMAG Board of Directors and RMAG Publications Team have made the decision to decrease publications to 3 times a year, spring, summer, and winter.
