Scale independence of décollement thrusting
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Published:January 01, 2007
Orogen-scale décollements (detachment surfaces) are an enduring subject of investigation by geoscientists. Uncertainties remain as to how crustal convergence processes maintain the stresses necessary for development of low-angle fault surfaces above which huge slabs of rock are transported horizontally for tens to hundreds of kilometers. Seismic reflection profiles from the southern Appalachian crystalline core and several foreland fold-and-thrust belts provide useful comparisons with high-resolution shallow-penetration seismic reflection profiles acquired over the frontal zone of the Michigan lobe of the Wisconsinan ice sheet northwest of Chicago, Illinois. These profiles provide images of subhorizontal and overlapping dipping reflections that reveal a ramp-and-flat...
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Contents
4-D Framework of Continental Crust

GeoRef
- Appalachians
- basement
- basins
- Cenozoic
- clastic sediments
- continental crust
- crust
- decollement
- deformation
- detachment faults
- faults
- geophysical methods
- geophysical surveys
- Illinois
- Lake Michigan Lobe
- metamorphic core complexes
- North America
- orogenic belts
- Pleistocene
- Quaternary
- reflection methods
- scale factor
- sediments
- seismic methods
- surveys
- systems
- tectonics
- thrust faults
- till
- United States
- upper Pleistocene
- Wisconsinan
- vergence
- Wadsworth Till
- Haeger Till