Tectonic Imbrication And Foredeep Development In The Penokean Orogen East Central Minnesota
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Author | : David Leroy Southwick |
Publisher | : |
Total Pages | : 40 |
Release | : 1991 |
Genre | : Geology |
ISBN | : |
Download Tectonic Imbrication and Foredeep Development in the Penokean Orogen, East-central Minnesota Book in PDF, Epub and Kindle
Author | : D. L. Southwick |
Publisher | : |
Total Pages | : |
Release | : 1991 |
Genre | : Geology |
ISBN | : |
Download Tectonic Imbrication and Foredeep Development in the Penokean Orogen, East-central Minnesota Book in PDF, Epub and Kindle
Author | : David Leroy Southwick |
Publisher | : |
Total Pages | : 31 |
Release | : 1992 |
Genre | : Faults (Geology) |
ISBN | : |
Download Tectonic Imbrication and Foredeep Development in the Penokean Orogen, East-central Minnesota--an Interpretation Based on Regional Geophysics and the Results of Test-drilling Book in PDF, Epub and Kindle
The Felch and Calumet troughs area of northern Michigan is part of the Penokean fold-thrust belt of the continental foreland of the Superior craton. The area lies immediately north of the Niagara fault zone, the north-verging suture between the continental foreland and the Early Proterozoic Wisconsin magmatic terranes to the south. Accretion of the magmatic terranes to the continental margin approximately equals 1,850 Ma produced south-verging backthrusting and backfolding in this region involving both Archean basement and Early Proterozoic supracrustal strata. Evidence for backthrusting exists throughoutthe Felch and Calumet troughs area. The backthrusting is characterized by southward-overturned bedding and small-scale, south-verging asymmetric folds with a subhorizontal axial-planar foliation. The Carney Lake Archean block appears to be a crystalline-core nappe wherein the Sturgeon Quartzite of the Chocolay Group forms the lower overturned limb. The deformation probably started as a north-verging foreland thrust event, but out-of- sequence south-verging backthrusts and backfolds developed to accommodate abrupt changes in crustal thickness along the continental margin. The backthrusting in the Penokean orogen resembles that in the younger rocks of the southern Alps. Proceeding inward from the continental margin, both orogens have accreted oceanic crust, indicated by the presence of ophiolite, that is thrust onto the continental margin; a zone of thick-skinned complex deformation characterized by backthrusting and backfolding; a marginal basement arch; and, inboard of the arch, a fold-thrust belt that mainly involves thin-skinned deformation.
Author | : D. L. Southwick |
Publisher | : |
Total Pages | : |
Release | : 1991 |
Genre | : Geology |
ISBN | : |
Download Tectonic Imbrication and Foredeep Development in the Penokean Orogen, East-central Minnesota Book in PDF, Epub and Kindle
Author | : David Leroy Southwick |
Publisher | : |
Total Pages | : 40 |
Release | : 1991 |
Genre | : Geology |
ISBN | : |
Download Tectonic Imbrication and Foredeep Development in the Penokean Orogen, East-central Minnesota--an Interpretation Based on Regional Geophysics and the Results of Test-drilling Book in PDF, Epub and Kindle
Author | : Etats-Unis. Geological Survey |
Publisher | : |
Total Pages | : |
Release | : 1991 |
Genre | : |
ISBN | : |
Download Contributions to Precambrian Geology of Lake Superieur Region Book in PDF, Epub and Kindle
Author | : Gene L. LaBerge |
Publisher | : |
Total Pages | : 346 |
Release | : 1991 |
Genre | : Faults (Geology) |
ISBN | : |
Download U.S. Geological Survey Bulletin Book in PDF, Epub and Kindle
A reconnaissance study carried out in conjunction with regional geologic mapping.
Author | : |
Publisher | : |
Total Pages | : 228 |
Release | : 1983 |
Genre | : Geology |
ISBN | : |
Download U.S. Geological Survey Bulletin Book in PDF, Epub and Kindle
Author | : |
Publisher | : |
Total Pages | : 372 |
Release | : 1991 |
Genre | : Geology |
ISBN | : |
Download New Publications of the U.S. Geological Survey Book in PDF, Epub and Kindle
Author | : Geological Survey (U.S.) |
Publisher | : |
Total Pages | : 746 |
Release | : 1991 |
Genre | : Geology |
ISBN | : |
Download New Publications of the Geological Survey Book in PDF, Epub and Kindle