Paleogene landscape and basin evolution in the Missouri River Headwater region of the Basin and Range Province in southwestern Montana: Implications for Paleogene extensional tectonic models and magmatism
Persistent URL
Author(s)
Schwartz, R.K.
Allegheny College
Schwartz, T.M.
Elliott, C.G.
Date Issued
June 18, 2026
Abstract
The publication presents integrated facies, paleocurrent, compositional, and detrital zircon data for Paleogene strata in Tertiary basins west of the Highland Mountains (Deer Lodge, Deep Creek, northern Big Hole, Divide, and Melrose Basins) in order to address paleogeography, provenance, sediment dispersal, basin evolution, and tectonism. In addition, entire age distributions for granitic plutons in the study area are presented in order to make highly effective comparisons with detrital zircon data and decipher source-to-basin history. Results include new insight into long-term tectonic evolution of the Anaconda-Flint Creek uplift and detachment complex, age of pluton emplacement and age modification, and origin of the intermontane basins.
Citation
Schwartz, R.K, Schwartz, T.M., and Elliott, C.G., 2026, Paleogene landscape and basin evolution in the Missouri River Headwater region of the Basin and Range Province in southwestern Montana: Implications for Paleogene extensional tectonic models and magmatism: Montana Bureau of Mines and Geology Memoir 71, 119 p.
Publisher
Montana Bureau of Mines and Geology
Version of Article
Version of Record
DOI
10.59691/XZSD6846
Series
Montana Bureau of Mines and Geology Memoir; 71
Type of Publication
Reports
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2026_Schwartz_Paleogene.pdf
Size
62.07 MB
Format
Adobe PDF
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