Includes bibliographical references (p. 8-10).
|Statement||by Timothy B. Holst.|
|Series||Contributions to Precambrian geology of Lake Superior region, U.S. Geological Survey bulletin -- 1904-D|
|LC Classifications||QE75 .B9 no. 1904-C-D, QE653.5 .B9 no. 1904-C-D|
|The Physical Object|
|Pagination||[ii], 10 p. :|
|Number of Pages||10|
|LC Control Number||90014023|
Get this from a library! Structural geology of parautochthonous and allochthonous terranes of the Penokean orogeny in Upper Michigan: comparisons with northern Appalachian tectonics. [William J Gregg; Geological Survey (U.S.)]. CENTRAL AND EASTERN MINNESOTA, AND ACCOMPANYING TEXT By D.L. Southwick, G.B. Morey, and Peter L. McSwiggen ABSTRACT The geology of the Animikie basin and contiguous rocks of Early Proterozoic age in central and eastern Minnesota (collectively constituting the western end of the Penokean orogen) is reinterpreted in terms of. b cd / southwick, d. l., / tectonic imbrication and foredeep development in the penokean orogen, east-central minnesota – an interpretation based on regional geophysics and the results of test-drilling the penokean orogeny in minnesota and upper michigan – a comparison of structural geology, , pb, 10 pages, 9 figs., $ 5. The evolution of the basin can be divided into an extensional stage with attendant deposition of stratified rocks, and a subsequent compressional stage assigned to the Penokean orogeny. The lower Proterozoic stratified rocks in the Animikie basin in Minnesota can be divided into two zones on the basis of pronounced differences in facies and.
b q / gregg, w. j. / structural geology of parautochthonous and allochthonous terranes of the penokean orogeny in upper michigan – comparison with northern appalachian tectonics, , 28 pages, 16 figs., 2 tables, $ 6. The results of studies of the Penokean orogen in the Lake Superior region through the early s were summarized by Sims and Carter (). Van Schmus () found that the Penokean events ranged in age from about – Ma; the end of the Penokean being marked by a Cited by: Sedimentation from the GLTZ-rifting environment continued into the Penokean orogeny, which is the next major tectonic event in the Great Lakes region. Several earthquakes have been documented in Minnesota, Michigan's Upper Peninsula and Sudbury in the last years along the GLTZ. Location source: Proterozoic tectonic and crustal evolution of the Upper Great Lakes region, North America Edited by Daniel K. Holm, David Schneider, Val W. Chandler Volume , Issues 1–4.
We resolved the architecture of the early Proterozoic Penokean orogen suture and late middle Proterozoic (Keweenawan) Midcontinent rift system magmatic overprint in east-central Minnesota and western Wisconsin through recovery and analysis of a legacy magnetotelluric (MT) data by: 3. Tectonic imbrication and foredeep development in the Penokean orogen, east-central Minnesota an interpretation based on regional geophysics and the results of test-drilling / by D.L. Southwick and G.B. Morey. The Penokean orogeny in Minnesota and upper Michigan a comparison of structural geology / by Timothy B. Hoist. by: The M2 event was probably Early Proterozoic and pre-Penokean, with metamorphic conditions more intense than those generally ascribed to the Penokean Orogeny in Michigan, but similar to the. Terranes of the Penokean Orogeny in Upper Michigan Comparisons with Northern Appalachian Tectonics By William J. Gregg1 Abstract The Precambrian terrane of Michigan's Upper Peninsula consists largely of Archean massifs and mantled gneiss domes surrounded by weakly to highly strained belts of ProterozoicCited by: 6.