Advances in the geology of the Tobacco Root Mountains, Montana, and their implications for the history of the northern Wyoming province
Abstract Integrated studies by Keck Geology Consortium participants have generated many
new insights into the Precambrian geology of the Tobacco Root Mountains. We have
clarified the tectonic setting and origin of two suites of metamorphic rocks:(1) a
quartzofeldspathic gneiss complex with associated metasupracrustal rocks (the combined
Indian Creek and Pony–Middle Mountain Metamorphic Suites) that originated in a
continental arc setting between 3.35 and 3.2 Ga with subsequent sedimentation and (2) …
new insights into the Precambrian geology of the Tobacco Root Mountains. We have
clarified the tectonic setting and origin of two suites of metamorphic rocks:(1) a
quartzofeldspathic gneiss complex with associated metasupracrustal rocks (the combined
Indian Creek and Pony–Middle Mountain Metamorphic Suites) that originated in a
continental arc setting between 3.35 and 3.2 Ga with subsequent sedimentation and (2) …
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