Current Issues of the Mountain Geologist
May 25 | December 24 | September 24 | April 2024 | January 2024 | December 2023
Members have access the six most recent issues of The Mountain Geologist, which will remain on the RMAG web site approximately 18 months. Please note the expiration dates shown with each issue.
May 2025, THE MOUNTAIN GEOLOGIST, VOLUME 62, NUMBER 1
Intergrated stratigraphic and geochemical analysis of organic-rich intervals of the Lewis Shale in the eastern Washakie Basin, Wyoming
Jane S. Hearon, Justin E. Birdwell, Paul C. Hackley
5
Geologic Map of the Skull Ridge Quadrangle, Sheridan County, Wyoming, USA
Robert Andreoli, Jennifer Gifford, Shawn Malone, Chanler Samples, Jillian Dees, Benton Moore, Laysen Keel, Ethan Rodgers & John Perry
37
A New Look At The Regional Sequence Stratigraphic Framework Of The Classic Greenhorn T-R Cycle Across Northeastern, Colorado, Southeastern Wyoming, And Southwestern Nebraska
Kellen Peat, A.D. Donovan, M.C. Pope, F. Marcantonio
55
Tectonic Influence of the Transcontinental Arch on Sediment Provenance: Detrital Zircon Geochronology of the Middle Cambrian Flathead Sandstone, Bighorn Mountains, Wyoming
Joseph Moll, Shah Bilawal Ali, David Malone, Jeffrey Strasser, Jenny Arkle
87
MEMBER ALERT. The May 2025 issue of The Mountain Geologist will be removed from the RMAG website approximately December 31, 2026. If you wish to download this issue, you must do so before this date.
December 2024 THE MOUNTAIN GEOLOGIST, VOLUME 61, NUMBER 4
An Unusual Glacial Event in the Comanche Peak Wilderness Area, Larimer County, Colorado
Thomas D. Moeglin, Sanford Kaplan
251
Composite stratigraphic section across the mid-Miocene climatic optimum and transition in the Tesuque Formation, Espanola Basin, north-central New Mexico
Garrett R. Williamson, Dustin E. Sweet
259
MEMBER ALERT. The December 2024 issue of The Mountain Geologist will be removed from the RMAG website approximately June 30, 2026. If you wish to download this issue, you must do so before this date.
September 2024 THE MOUNTAIN GEOLOGIST, VOLUME 61, NUMBER 3
Mechanical Stratigraphy and Deformation of the Gobbler Anticline, Sacramento Mountains, New Mexico, USA
Joseph C. Syzdek, Christopher K. Zahm, Charles Kerans, David H. Malone
169
Characterization and Evolution of the Professor Valley Salt Body, Paradox Basin, Utah Using Integrated Geological, Geochemical and Geophysical(Gravity) Techniques
Derek T. Scott, Mark R. Baker, Diane I. Doser, Katherine A. Giles
201
A reinterpretation of the Jelm and Popo Agie formations (Triassic, Wyoming) as a distributive fluvial system (DFS) and the role f the accomodation/sedimentation ration in DFS deposition
Max E. Deckman, David M. Lovelace, Steven M. Holland
219
MEMBER ALERT. The September 2024 issue of The Mountain Geologist will be removed from the RMAG website approximately March 31, 2026. If you wish to download this issue, you must do so before this date.
April 2024 THE MOUNTAIN GEOLOGIST, VOLUME 61, NUMBER 2
Western Interior Carbonates: Wyoming's Rare Jurassic Oolitic Eolianites
James L. Strasen, Henry S. Chafetz
85
Geologic Map of Spanish Point 7.5 Minute Quadrangle, Big Horn County Wyoming (Scale 1:24,000)
Gracie Stevens, Sarah Rose Lesmann, William Finucane, David Malone
107
Investigations in the Late Eocene Castle Rock Conglomerate of Colorado from 1869 to the Present-Part 2: Geologic History, Age, Diagenesis, and Future Research
Stephen M. Keller, Matthew L. Morgan
125
A Reinterpretation of the Stratigraphy of the Upper Cretaceous Section in the Area of the Boulder-Weld Fault Zone East of Boulder, Colorado
Ken Kittleson, David Malone
151
MEMBER ALERT. The April 2024 issue of The Mountain Geologist will be removed from the RMAG website approximately October 31, 2025. If you wish to download this issue, you must do so before this date.
January 2024 THE MOUNTAIN GEOLOGIST, VOLUME 61, NUMBER 1
Flood Events that Helped Shape Colorado's Castlewood Canyon Carved into the Eocene Castle Rock Conglomerate: An Introduction to this Focused Issue
Mark W. Longman, Joan Burleson, James W. Hagadorn
5
Investigations in the Late Eocene Castle Rock Conglomerate of Colorado from 1869 to the present - Part 1: Description, Nomenclature, and Mapping
Stephen M. Keller, Matthew L. Morgan
17
Opal Cement in the Eocene Castle Rock Conglomerate, Central Colorado
Mark W. Longman, Nik Svihlik, Joan Burleson, James W. Hagadorn
49
A New Technique for Quantifying Opal Content in Colorado's Upper Eocene Castle Rock Conglomerate
Nik Svihlik, Mark Longman
71
MEMBER ALERT. The December 2023 issue of The Mountain Geologist will be removed from the RMAG website approximately July 31, 2025. If you wish to download this issue, you must do so before this date.
December 2023 THE MOUNTAIN GEOLOGIST, VOLUME 60, NUMBER 4
Helium - Relationships to other reservoir gases and some implications for exploration: The New Mexico Example
Ronald F. Broadhead
141
Recent Developments in Helium Exploitation in southern Saskatchewan and adjacent areas of Montana and Alberta
Duncan MacKenzie
159
Exploration for Helium in the Phanerozoic
Paul Lafleur
181
An Oil and Gas Play Turns Into a Prime Helium Prospect
Bruce A. Black
189
Fly Me to the Moon
Tim Rynott
197
MEMBER ALERT. The December 2023 issue of The Mountain Geologist will be removed from the RMAG website approximately June 30, 2025. If you wish to download this issue, you must do so before this date.
