Exploring The Midcontinent Rift
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Exploring The Midcontinent Rift
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Author :
language : en
Publisher:
Release Date : 2006
Exploring The Midcontinent Rift written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Geology, Stratigraphic categories.
Middle Proterozoic To Cambrian Rifting Central North America
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Author : Richard W. Ojakangas
language : en
Publisher: Geological Society of America
Release Date : 1997-01-01
Middle Proterozoic To Cambrian Rifting Central North America written by Richard W. Ojakangas and has been published by Geological Society of America this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997-01-01 with Science categories.
Based on the Tenth International Basement Tectonics Conference held at the University of Minnesota-Duluth in August 1992, this volume contains 19 papers, 13 of which focus on the Middle Proterozoic Midcontinent Rift. An introductory essay discussing the Middle Proterozoic to Cambrian rifting in central North America is followed by contributions addressing topics including the Midcontinent Rift in Michigan and Minnesota, the Port Coldwell veins of northern Ontario, and petrography and sedimentation in the western Lake Superior region. The last five papers deal with the pre-Mount Simon basins of Ohio, the English Graben and the newly proposed East Continent Rift Complex, the Reelfoot Rift/Rough Creek Graben in the evolution of the Illinois Basin, and the A-type sheet granites in the Oklahoma Aulacogen of Cambrian age. Bandw illustrations. Annotation copyrighted by Book News, Inc., Portland, OR
Clastic Rocks Associated With The Midcontinent Rift System In Iowa
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Author : Raymond R. Anderson
language : en
Publisher:
Release Date : 1997
Clastic Rocks Associated With The Midcontinent Rift System In Iowa written by Raymond R. Anderson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Geology categories.
The Middle Proterozoic Midcontinent Rift System (MRS) of North America is a failed rift that formed in response to region-wide stresses about 1,100 Ma. In Iowa, the MRS is buried beneath 2,200-3,500 ft of Paleozoic and Mesozoic sedimentary rocks and Quaternary glaciogenic deposits. An extremely large volume of sediments was deposited within basins associated with the rift at several stages during its development. Although the uplift of a rift-axial horst resulted in the erosional removal of most of these clastic rocks from the central region of the MRS in Iowa, thick sequences are preserved in a series of horst-bounding basins. Recent studies incorporating petrographic analysis, geophysical modeling, and other analytical procedures have led to the establishment of a preliminary stratigraphy for these clastic rocks and interpretations of basin geometries. This information has allowed the refinement of existing theories and history of MRS formation in Iowa. Additionally, drill samples previously interpreted as indicating the existence of early Paleozoic basins overlying the Proterozoic MRS basins were re-examined. Samples previously interpreted as deep-lying Paleozoic rocks are now known to have caved from upper levels of the drillhole and were out of stratigraphic position. No deep Paleozoic basins exist in this area. These investigations led to the development of petrographic parameters useful in differentiating the Proterozoic MRS Red clastics from Paleozoic clastic rocks having similar lithologies.
Geodynamics Of Rifting
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Author : P.A. Ziegler
language : en
Publisher: Elsevier
Release Date : 2015-12-04
Geodynamics Of Rifting written by P.A. Ziegler and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-12-04 with Science categories.
This volume contains papers giving an interdisciplinary review of 12 major rift systems from North and South America, Africa, Europe and Asia. These papers are written by an international group of academic and industrial specialists each of whom is most knowledgeable about the respective rift. The analyzed rifts were selected on the basis of availability of an as-complete-as-possible geological and geophysical data base. Thirteen papers deal with geodynamic processes governing the evolution of rifts. A comprehensive digest of the available stratigraphic, structural, geophysical and petrological data, together with an extensive list of references, is provided for each of the analyzed rift systems. The megatectonic setting and dynamics of evolution of each basin is discussed. Geodynamic models are tested against the record of the analyzed rifts. The question of "active" as against "passive" rifting is addressed. The rifts analyzed range in age from Precambrian to Recent and cover a wide spectrum of megatectonic settings. There is discussion of the evolution of rifts in a plate-tectonic frame. The case histories are followed by discussions addressing the global setting of rifts and geodynamic processes active during the development of rifted basins.
Organic Geochemical And Tectonic Evolution Of The Midcontinent Rift System
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Author :
language : en
Publisher:
Release Date : 1992
Organic Geochemical And Tectonic Evolution Of The Midcontinent Rift System written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.
The older assemblages stand in contrast with the ca. 1000 Ma old Hunting Formation, Arctic Canada, which contains what may be the oldest evidence for modem algae - red algal fossils that compare closely with members of the extant family Bangiophyceae (Butterfield et al., 1990). Taken together the Nonesuch, Shaler, Hunting and other assemblages support the hypothesis of a major episode of eukaryotic diversification ca. 1000 Ma ago. Prior to this time, eukaryotic primary producers must have been physiologically primitive (and now extinct) algae whose abundance in ecosystems is poorly constrained by analogies with the present oceans. Cyanobacteria were major primary producers in a wide range of marine environments. After 1000 Ma, diversifying red green and chromophyte algae contributed significantly to primary production in all save microbial mat communities in restricted environments. It bears mention that such mat communities remained significant potential sources of buried organic matter until the end of the Proterozoic, necessitating exploration strategies that differ from those commonly employed for younger rocks (Knoll, in press). As in Phanerozoic basins, petroleum exploration in Proterozoic rocks requires tools for stratigraphic correlation. In Neoproterozoic (
Exploring The Relationship Between The Nemaha Uplift And The Mid Continent Rift Using 3d Mapping Visual Analysis
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Author : Faris A. Abanumay
language : en
Publisher:
Release Date : 2018
Exploring The Relationship Between The Nemaha Uplift And The Mid Continent Rift Using 3d Mapping Visual Analysis written by Faris A. Abanumay and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with Electronic dissertations categories.
Organic Geochemical And Tectonic Evolution Of The Midcontinent Rift System Final Report
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Author :
language : en
Publisher:
Release Date : 1992
Organic Geochemical And Tectonic Evolution Of The Midcontinent Rift System Final Report written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.
The older assemblages stand in contrast with the ca. 1000 Ma old Hunting Formation, Arctic Canada, which contains what may be the oldest evidence for modem algae - red algal fossils that compare closely with members of the extant family Bangiophyceae (Butterfield et al., 1990). Taken together the Nonesuch, Shaler, Hunting and other assemblages support the hypothesis of a major episode of eukaryotic diversification ca. 1000 Ma ago. Prior to this time, eukaryotic primary producers must have been physiologically primitive (and now extinct) algae whose abundance in ecosystems is poorly constrained by analogies with the present oceans. Cyanobacteria were major primary producers in a wide range of marine environments. After 1000 Ma, diversifying red green and chromophyte algae contributed significantly to primary production in all save microbial mat communities in restricted environments. It bears mention that such mat communities remained significant potential sources of buried organic matter until the end of the Proterozoic, necessitating exploration strategies that differ from those commonly employed for younger rocks (Knoll, in press). As in Phanerozoic basins, petroleum exploration in Proterozoic rocks requires tools for stratigraphic correlation. In Neoproterozoic (
The North American Midcontinent Rift System
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Author : John K. Reed
language : en
Publisher:
Release Date : 2000
The North American Midcontinent Rift System written by John K. Reed and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Catastrophes (Geology) categories.
Exploring Extreme And Unusual Geology In The Stable Midcontinent
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Author : Marcia K. Schulmeister
language : en
Publisher: Geological Society of America
Release Date : 2019-04-18
Exploring Extreme And Unusual Geology In The Stable Midcontinent written by Marcia K. Schulmeister and has been published by Geological Society of America this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-04-18 with Geology categories.
"The papers in this volume illustrate unique, but often overlooked, geologic events of the last 300 million years. Rock outcrops and landscapes, ranging in age from Upper Pennsylvanian through the Anthropocene, are presented that address the following themes: cyclothems, a Permian salt giant, Midcontinent kimberlite intrusions, and Midcontinent glaciation"--
An Integrated Geophysical Investigation Of The Midcontinent Rift System
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Author : David Jennings Allen
language : en
Publisher:
Release Date : 1994
An Integrated Geophysical Investigation Of The Midcontinent Rift System written by David Jennings Allen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Geology, Stratigraphic categories.