February 2019 The Mountain Geologist, Volume 56, Number 1

Strontium residual salt analyses (SrRSA) and geochemistry of Bakken Formation core samples from Fleckton 1-20, North Dakota
Zell E. Peterman, Kiyoto Futa, Thomas A. Oliver
5

Quantifying the stratigraphic and spatial facies distribution in an ancient mixed-influence delta
Nathan M. La Fontaine, Michael H. Hofmann
19

Diagenesis of the Sappington Formation in the Bridger Range, Montana: Implications for the burial and thermal history of the Western Crazy Mountain Basin
Clayton Schultz, Michael Hofmann
45

MEMBER ALERT. The February 2019 issue of The Mountain Geologist will expire from the RMAG website August 31, 2020. If you wish to download this issue, you must do so before this date.


December 2018 The Mountain Geologist, Volume 55, Number 4

Geochemical and micropaleontological evidence of paleoenvironmental change in the Late Cretaceous Western Interior Seaway from the Niobrara to the Pierre Shale Formation
Kira K. Timm, Stephen A. Sonnenberg
145

Controls on organic matter distributions in Eocene Lake Uinta, Utah and Colorado 
Ronald C. Johnson, Justin E. Birdwell, Tracey J. Mercier
177

Seismicity in Nebraska and adjacent states: The historical perspective and current trends 
Irina Filina, Kris Guthrie, Mindi Searls, Caroline M. Burberry
217

MEMBER ALERT. The December 2018 issue of The Mountain Geologist will expire from the RMAG website June 30, 2020. If you wish to download this issue, you must do so before this date.


July 2018 The Mountain Geologist, Volume 55, Number 3

Subsurface reinterpretation of Ordovician and Devonian strata in southwest Wyoming with implications for upwarping across the Transcontinental Arch
Donna S. Anderson, Mark W. Longman
91

Detrital zircon geochronology of Pennsylvanian-Permian strata in Colorado: evidence for Appalachian-derived sediment and implications for the timing of Ancestral Rocky Mountains uplift
Kajal Nair, John Singleton, Christopher Holm-Denoma, Sven Egenhoff
119

MEMBER ALERT. The July 2018 issue of The Mountain Geologist will expire from the RMAG website January 31, 2020. If you wish to download this issue, you must do so before this date.


April 2018 The Mountain Geologist, Volume 55, Number 2

The Permian Minnekahta Limestone: A Saline Lake Gypsum Replaced by Calcite 
Kathleen C. Benison, Jonathan P. Knapp, Adam Difrisco, E. Troy Rasbury
59

Icacinaceae in the early middle Paleocene Raton Formation, Colorado
Keith Berry
75

MEMBER ALERT. The April 2018 issue of The Mountain Geologist will expire from the RMAG website October 31, 2019. If you wish to download this issue, you must do so before this date.


January 2018 The Mountain Geologist, Volume 55, Number 1

Paleontological evidence against a major geographic barrier at about the paleolatitude of Colorado, USA, during the Late Campanian
Keith Berry
5

Expression of the Colorado Mineral Belt in Upper Cretaceous Niobrara Formation source rock maturity data from the Denver Basin
David J. Thul, Stephen A. Sonnenberg
19

MEMBER ALERT. The January 2018 issue of The Mountain Geologist will expire from the RMAG website July 31, 2019. If you wish to download this issue, you must do so before this date.


October 2017 The Mountain Geologist, Volume 54, Number 4

Stratigraphic Intervals for Oil and Tar Sands Deposits in the Uinta Basin, Utah
Ronald C. Johnson, Justin E. Birdwell, Paul G. Lillis
227

Hanna of Wyoming— The Rockies’ Deepest Basin
Roger M. Matson, W. Jack Magathan
265

MEMBER ALERT. The October 2017 issue of The Mountain Geologist will expire from the RMAG website April 30, 2019. If you wish to download this issue, you must do so before this date.