Archean to Anthropocene: Field Guides to the Geology of the Mid-Continent of North America

This volume of 25 field guides plus one paper on field instruction was prepared in conjunction with the 2011 GSA Annual Meeting in Minneapolis, Minnesota. The diverse slate of field trips spans a geologically broad range of topics, including the Precambrian geology of the southern Canadian Shield; the economic geology of the Lake Superior region; Phanerozoic strata in Minnesota, Wisconsin, Iowa, and North Dakota; glacial geology; hydrogeology and limnology; undergraduate and K12 geoscience field education; archaeological investigations in the upper Mississippi River valley; and geology by bicycle.
Structural geology of the subprovince boundaries in the Archean Superior Province of northern Minnesota and adjacent Ontario Available to Purchase
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Published:January 01, 2011
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CitationRobert L. Bauer, Dyanna M. Czeck, Peter J. Hudleston, Basil Tikoff, 2011. "Structural geology of the subprovince boundaries in the Archean Superior Province of northern Minnesota and adjacent Ontario", Archean to Anthropocene: Field Guides to the Geology of the Mid-Continent of North America, James D. Miller, George J. Hudak, Chad Wittkop, Patrick I. McLaughlin
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ABSTRACT
The geometric, kinematic, and deformational features along the subprovince boundaries of the Archean Superior Province are keys to understanding the tectonic amalgamation of the province. This field trip investigates the structural geology along two of the subprovince boundaries—the Wabigoon-Quetico and Quetico-Vermilion—of the Superior Craton. These boundaries separate the relatively high-grade gneisses of the Quetico Belt from typical low-grade granite-greenstone terranes to its north (Wabigoon) and south (Wawa). Both boundaries are characterized by different styles of transpressional deformation and strike-slip tectonism. Along the Wabigoon-Quetico boundary, deformation is recorded by a variety of structures controlled by competence contrast of heterogeneous lithologies at a variety of scales: from weak greenstones surrounding more competent gneiss domes to deformed polymictic conglomerates. Along the Quetico-Vermilion boundary, we will emphasize the role of plutonism and pluton geometry on subsequent deformation. Lastly, we characterize multiple deformation episodes in the Vermilion district in Minnesota.
- Archean
- Canada
- Canadian Shield
- deformation
- Eastern Canada
- faults
- field trips
- gneisses
- intrusions
- metamorphic rocks
- Minnesota
- North America
- Ontario
- plutons
- Precambrian
- Quetico Belt
- road log
- strike-slip faults
- Superior Province
- tectonic elements
- tectonics
- terranes
- transpression
- United States
- Vermilion Range
- Wabigoon Belt
- Wawa Belt
- northern Minnesota