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Stratigraphy Magnetic Susceptibility And Mineralogy Of Loess Paleosol Sequences In Southwestern Illinois And Eastern Missouri
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Book Synopsis Stratigraphy, Magnetic Susceptibility, and Mineralogy of Loess-paleosol Sequences in Southwestern Illinois and Eastern Missouri by : David Aaron Grimley
Download or read book Stratigraphy, Magnetic Susceptibility, and Mineralogy of Loess-paleosol Sequences in Southwestern Illinois and Eastern Missouri written by David Aaron Grimley and published by . This book was released on 1996 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic susceptibility (MS) zones, controlled by silt-size magnetite concentrations, have been delineated within oxidized, C horizon Peoria and Loveland Silts along the Illinois and Mississippi Valleys. Lower Peoria and lower Loveland Silts (MS = 55-80 $times 10sp{-5}$ SI) and Roxana Silt (MS = 60-90 $times 10sp{-5}$) have high MS probably reflecting greater contributions from Superior Lobe outwash. Middle Peoria and upper Loveland Silts (MS = 20-55 $times 10sp{-5}$) and upper Peoria Silt (MS = 40-60 $times 10sp{-5}$) have low MS, probably reflecting dilution by Lake Michigan Lobe outwash upon maximum advance of glaciers in Illinois. Feldspar/quartz and kaolinite/illite X-ray diffraction peak height ratios also increase in zones of high MS. Bulk and magnetic grain size distributions are generally uniform across MS zones at sections studied. Peoria Silt MS zones are particularly striking in loess proximal to the Illinois (Ancient Mississippi) Valley because of source area shifts caused by Mississippi River diversion at about 20.5 ka. MS zones are less pronounced along the Mississippi Valley south of St. Louis. Alteration of magnetite in gleyed loess can occur but is not thought to cause MS zones observed because minor increases in illite and dolomite in low MS zones are more consistent with a source area hypothesis. Jules and Gardena (interstadial) Geosol occur in upper portions of middle and lower Peoria Silt and are estimated to be 15-16 ka and 20-20.5 ka, respectively. Clay beds, deposited during peak glacial floods (16-20 ka), occur within middle Peoria Silt. Ultrafine magnetite and maghemite (0.01-0.1 $mu$m), authigenically formed, are responsible for high MS in upper solums of modern soils and paleosols, where they are preserved and can accumulate under oxidizing conditions. Highly substituted superparamagnetic and single domain magnetite probably forms extracellularly to bacteria in soils and later alters to maghemite. Soil firing can be locally important in causing high MS. Bt horizon thicknesses, clay content increases, feldspar weathering, and amounts of neoformed ferrimagnetics and mixed-layered kaolinite-expandables all indicate considerably greater time for development of the Yarmouth Geosol compared to the Sangamon Geosol. In the study area, Yarmouth Geosol is estimated to represent oxygen isotope stages 7-11 and the Sangamon Geosol stage 5 and portions of stage 4. Loveland Silt was probably deposited during stage 6 only. Crowley's Ridge Silt, into which Yarmouth Geosol formed, is estimated to have been deposited during stage 12. Bridgeton geosol (new) may represent stages 13-15 and Bonfils silt (new), stage 16.
Book Synopsis Guidebook Series (Illinois State Geological Survey) by :
Download or read book Guidebook Series (Illinois State Geological Survey) written by and published by . This book was released on 2001 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ISGS Guidebook written by and published by . This book was released on 1999 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 63rd Annual Tri-State Geological Field Conference by :
Download or read book 63rd Annual Tri-State Geological Field Conference written by and published by . This book was released on 2000 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Characterization and Paleoenvironmental Significance of the North Central Wisconsin Loess Sheet by : Kristine Emma Stanley
Download or read book Characterization and Paleoenvironmental Significance of the North Central Wisconsin Loess Sheet written by Kristine Emma Stanley and published by . This book was released on 2008 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Physical Geography and Geology of the Driftless Area by : Eric C. Carson
Download or read book The Physical Geography and Geology of the Driftless Area written by Eric C. Carson and published by Geological Society of America. This book was released on 2019-11-04 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bulletin written by and published by . This book was released on 2001 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Guidebook Series by : Illinois State Geological Survey
Download or read book Guidebook Series written by Illinois State Geological Survey and published by . This book was released on 1999 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Magnetic Stratigraphy by : Meil D. Opdyke
Download or read book Magnetic Stratigraphy written by Meil D. Opdyke and published by Academic Press. This book was released on 1996-11-19 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic Stratigraphy is the most comprehensive book written in the English language on the subject of magnetic polarity stratigraphy and time scales. This volume presents the entirety of the known geomagneticrecord, which now extends back about 300 million years. The book includes the results of current research on sea floor spreading, magnetic stratigraphy of the Pliocene and Pleistocene, and postulations on the Paleozoic. Also included are both historicalbackground and applications of magnetostratigraphy. Individual chapters on correlation are presented, using changes in magnetic properties and secular variation. Key Features* Discusses pioneering work in the use of marine sediments to investigate the Earths magnetic field* Serves as a guide for students wishing to begin studies in magnetostratigraphy* Provides a comprehensive guide to magnetic polarity stratigraphy including up-to-date geomagnetic polarity time scales* Correlates magnetic stratigraphics from marine and non-marine Cenozoic sequences* Details reversal history of the magnetic field for the last 350 million years* Discusses correlation using magnetic dipole intensity changes* Up-to-date correlation of biostratigraphy with magnetic stratigraphy through the late Jurassic
Book Synopsis Guidebook for Field Trips for the Thirty-fifth Annual Meeting of the North-Central Section of the Geological Society of America by :
Download or read book Guidebook for Field Trips for the Thirty-fifth Annual Meeting of the North-Central Section of the Geological Society of America written by and published by . This book was released on 2001 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bibliography and Index of Illinois Geology, 1966-1996 by : Lynne Raymond Martin
Download or read book Bibliography and Index of Illinois Geology, 1966-1996 written by Lynne Raymond Martin and published by . This book was released on 2001 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1996 with total page 1006 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Lithology and Stratigraphy of Loess and Paleosols by : International Union for Quaternary Research. Congress
Download or read book Lithology and Stratigraphy of Loess and Paleosols written by International Union for Quaternary Research. Congress and published by . This book was released on 1984 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aandacht voor de morfogenese en kenmerken van loess-paleosolen; lithologische eigenschappen van loess in verschillende klimatologische zones; strategie en datering van loess en paleosols; aspecten met betrekking tot het nuttig gebruik van met loess bedekte gebieden
Book Synopsis Quaternary Geology, Geomorphology, and Climatic History of Kane County, Illinois by : B. B. Curry
Download or read book Quaternary Geology, Geomorphology, and Climatic History of Kane County, Illinois written by B. B. Curry and published by . This book was released on 1999 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Annual Report by : Illinois State Geological Survey
Download or read book Annual Report written by Illinois State Geological Survey and published by . This book was released on 1995 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Quaternary Period in the United States by : A.R. Gillespie
Download or read book The Quaternary Period in the United States written by A.R. Gillespie and published by Elsevier. This book was released on 2003-12-17 with total page 595 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews advances in understanding of the past ca. two million years of Earth history - the Quaternary Period - in the United States. It begins with sections on ice and water - as glaciers, permafrost, oceans, rivers, lakes, and aquifers. Six chapters are devoted to the high-latitude Pleistocene ice sheets, to mountain glaciations of the western United States, and to permafrost studies. Other chapters discuss ice-age lakes, caves, sea-level fluctuations, and riverine landscapes. With a chapter on landscape evolution models, the book turns to essays on geologic processes. Two chapters discuss soils and their responses to climate, and wind-blown sediments. Two more describe volcanoes and earthquakes, and the use of Quaternary geology to understand the hazards they pose. The next part of the book is on plants and animals. Five chapters consider the Quaternary history of vegetation in the United States. Other chapters treat forcing functions and vegetation response at different spatial and temporal scales, the role of fire as a catalyst of vegetation change during rapid climate shifts, and the use of tree rings in inferring age and past hydroclimatic conditions. Three chapters address vertebrate paleontology and the extinctions of large mammals at the end of the last glaciation, beetle assemblages and the inferences they permit about past conditions, and the peopling of North America. A final chapter addresses the numerical modeling of Quaternary climates, and the role paleoclimatic studies and climatic modeling has in predicting future response of the Earth's climate system to the changes we have wrought.
Book Synopsis Magnetic Stratigraphy by : Meil D. Opdyke
Download or read book Magnetic Stratigraphy written by Meil D. Opdyke and published by Academic Press. This book was released on 1996-11-04 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic Stratigraphy is the most comprehensive book written in the English language on the subject of magnetic polarity stratigraphy and time scales. This volume presents the entirety of the known geomagneticrecord, which now extends back about 300 million years. The book includes the results of current research on sea floor spreading, magnetic stratigraphy of the Pliocene and Pleistocene, and postulations on the Paleozoic. Also included are both historicalbackground and applications of magnetostratigraphy. Individual chapters on correlation are presented, using changes in magnetic properties and secular variation. Key Features * Discusses pioneering work in the use of marine sediments to investigate the Earths magnetic field * Serves as a guide for students wishing to begin studies in magnetostratigraphy * Provides a comprehensive guide to magnetic polarity stratigraphy including up-to-date geomagnetic polarity time scales * Correlates magnetic stratigraphics from marine and non-marine Cenozoic sequences * Details reversal history of the magnetic field for the last 350 million years * Discusses correlation using magnetic dipole intensity changes * Up-to-date correlation of biostratigraphy with magnetic stratigraphy through the late Jurassic