Clastic Rocks Associated With The Midcontinet Rift System In Iowa
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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.
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.
Clastic Rocks Associated With The Midcontinent Rift System In Iowa
DOWNLOAD
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.
Petrography And Correlation Of Precambrian Clastic Sedimentary Rocks Associated With The Midcontinent Rift System
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Author : Pieter Berendsen
language : en
Publisher:
Release Date : 1993
Petrography And Correlation Of Precambrian Clastic Sedimentary Rocks Associated With The Midcontinent Rift System written by Pieter Berendsen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Geology, Stratigraphic categories.
Clastic Rocks Associated With The Midcontinet Rift System In Iowa
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Author : Raymond R. Anderson
language : en
Publisher:
Release Date : 1997
Clastic Rocks Associated With The Midcontinet 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.
Clastic Rocks Associated With The Midcontinent Rift System In Lowa
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Author : Raymond R. Anderson
language : en
Publisher:
Release Date : 1989
Clastic Rocks Associated With The Midcontinent Rift System In Lowa 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 1989 with categories.
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
Special Report Series Iowa Geological Survey
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Author : Iowa Geological Survey
language : en
Publisher:
Release Date : 1979
Special Report Series Iowa Geological Survey written by Iowa Geological Survey and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Geology categories.
Iowa S Geological Past
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Author : Wayne I. Anderson
language : en
Publisher: University of Iowa Press
Release Date : 1998
Iowa S Geological Past written by Wayne I. Anderson and has been published by University of Iowa Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with History categories.
Iowa's rock record is the product of more than three billion years of geological processes. The state endured multiple episodes of continental glaciation during the Pleistocene Ice Age, and the last glacier retreated from Iowa a mere (geologically speaking) twelve thousand years ago. Prior to that, dozens of seas came and went, leaving behind limestone beds with rich fossil records. Lush coal swamps, salty lagoons, briny basins, enormous alluvial plains, ancient rifts, and rugged Precambrian mountain belts all left their mark. In "Iowa's Geological Past, " Wayne Anderson gives us an up-to-date and well-informed account of the state's vast geological history from the Precambrian through the end of the Great Ice Age. Anderson takes us on a journey backward into time to explore Iowa's rock-and-sediment record. In the distant past, prehistoric Iowa was covered with shallow seas; coniferous forests flourished in areas beyond the continental glaciers; and a wide variety of animals existed, including mastodon, mammoth, musk ox, giant beaver, camel, and giant sloth. The presence of humans can be traced back to the Paleo-Indian interval, 9,500 to 7,500 years ago. Iowa in Paleozoic time experienced numerous coastal plain and shallow marine environments. Early in the Precambrian, Iowa was part of ancient mountain belts in which granite and other rocks were formed well below the earth's surface. The hills and valleys of the Hawkeye State are not everlasting when viewed from the perspective of geologic time. Overall, Iowa's geologic column records an extraordinary transformation over more than three billion years. Wayne Anderson's profusely illustrated volume provides a comprehensive and accessible survey of the state's remarkable geological past.