Abstract Integrated studies by Keck Geology Consortium participants have generated many
new insights into the Precambrian geology of the Tobacco Root Mountains. We have …

ABSTRACT The Tobacco Root Mountains are located near the northwestern margin of the
Archean Wyoming province. This position places the Archean rocks of the Tobacco Root …

From the standpoint of the Laramide orogeny (Late Cretaceous-Early Tertiary) the northern
and western Tobacco Root Mountains and the Jefferson River Valley between Cardwell and …

Abstract The Middle Mountain Metamorphic Domain of the Montana Metasedimentary
Terrane, northwestern Wyoming Craton, within the northwestern Tobacco Root Mountains …

Just over two billion years ago, basaltic magma intruded rocks of the Pony–Middle Mountain
Metamorphic Suite and the Indian Creek Metamorphic Suite that now crop out in the …

ABSTRACT U-Pb analyses of zircons from gneisses, anatectic leucosome, metasedimentary
rocks, and a younger (metamorphosed) mafic dike from the Tobacco Root Mountains of …

In the Sheridan district, southwestern Tobacco Root Mountains, Montana, Precambrian
metasediments and metavolcanics are complexly folded and refolded. The exposed …

Extension has shaped the crust of the Northern Rocky Mountains for more than a billion
years. Rifting produced the Belt basin shortly after 1.5 Ga and initiated the Paleozoic passive …

Quartzofeldspathic gneisses and metamorphic mafic rocks are the dominant lithologies in
the Indian Creek and Pony–Middle Mountain Metamorphic Suites of the Tobacco Root …

Whence the Mountains? Inquiries into the Evolution of Orogenic Systems: A Volume in Honor of
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