Post-glacial Sedimentation and History in Lake Manitoba PDF Download
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Author: James T. Teller
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 218
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Author: James T. Teller
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 218
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Author: William Last
Publisher:
ISBN:
Category :
Languages : en
Pages : 1374
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Book Description
Lake Manitoba is a large (4700 km2), shallow (z = 4.0 m), brackish water lake located in south-central Manitoba. Sediment cores up to 13'5 m in length were taken at 50 offshore sites in the main South Basin of the lake. These cores were analyzed at varying intensities for over 40 physical, chemical, and mineralogical sediment parameters. The modern offshore sediments of the South Basin are mainly silts and clayey silts, and are composed of detrital and authigenic carbonates (20-60%), clay minerals (20-50%), organic matter (15-30%), quartz (15-30%), and feldspar (2-10%). Quartz, feldspar, and dolomite are in greatest abundance around the margin of the offshore basin, whereas organic matter, calcite, and clay minerals are concentrated in the central portion of the basin. The authigenic calcite, precipitated in response to high levels of supersaturation brought about by evaporative concentration and extensive phytoplankton productivity during the ice-free season, contains an average of about 7 mole percent MgCO3, in the crystal lattice. The post-glacial sediments in the South Basin of Lake Manitoba are composed dominantly of silty clay and clayey silt except toward the extreme southern end of the basin where less clayey and more sandy sediments are common. The clay content, quartz, feldspar, and dolomite as well as K, Na,Fe,and Mg show a general increase with depth in the sediment cores,' while silt, moisture content, organic matter, calcite, and Ca decrease with depth. On the basis of variations in these and other sediment parameters investigated, six lithostratigraphic units are recognized in the post-glacial record of the lake (Units A, B, C, D, E, and F from bottom to top)...
Author: E. Gierlowski-Kordesch
Publisher: Cambridge University Press
ISBN: 9780521031684
Category : Science
Languages : en
Pages : 470
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This is the first of a series of volumes that will assess key lacustrine sequences worldwide.
Author: John M. Melack
Publisher: Springer Science & Business Media
ISBN: 940093095X
Category : Science
Languages : en
Pages : 317
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Book Description
Limnological research on saline lakes is practiced by a growing cadre of scientists active worldwide in a diversity of disciplines. Every three years since 1979, an international symposium on inland saline waters has served to strengthen and expand the scope of the studies. Promising areas for further research especially well suited to saline lakes include the comparative physiology of adaptation to osmotic stresses, the role of microbial and protozoan communities in nutrient dynamics and biotic interactions in ecosystems with few species. The Third International Symposium on Inland Saline Lakes was held at the University of Nairobi, Nairobi, Kenya, under the auspices of the Societas Internationalis Limnologiae (SIL). The symposium was sponsored by and received financial or other support from the U.S. National Science Foundation (International Program), United Nations Environment Program, University of California, Santa Barbara, and University of Nairobi. The proceedings occurred for three days (28-31 August, 1985) and were attended by 33 scientists from 14 countries (see list of Participants). On the day prior to the first formal session an afternoon trip to Lake Magadi and salt works was held. The tribulations of this excursion served to acquaint the participants with each other and with the realities of exploring the African bush. A three day post-congress expedition to the rift valley included visits to spectacular saline lakes such as Nakuru and Bogoria. Much of the meeting's and excursion's success is owed to the efforts of the local organizer, Dr. Stephen G.
Author: Catherine Helen Yansa
Publisher:
ISBN:
Category :
Languages : en
Pages : 368
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Author: E.C. Pielou
Publisher: University of Chicago Press
ISBN: 0226668096
Category : Science
Languages : en
Pages : 380
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Book Description
The fascinating story of how a harsh terrain that resembled modern Antarctica has been transformed gradually into the forests, grasslands, and wetlands we know today.
Author: Alice Simms Williams
Publisher:
ISBN:
Category : Paleobotany
Languages : en
Pages : 36
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Author: William M. Last
Publisher: Springer Science & Business Media
ISBN: 0306476703
Category : Science
Languages : en
Pages : 532
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Theory Instrumentation NIR analysis of sediment samples Uses of NIRS in palaeolimnology Future perspectives Summary References Fly-ash particles. Neil Rose 319 12. Introduction A brief history Methods of extraction and enumeration Temporal distribution Spatial distribution Source apportionment The future Summary Acknowledgements References Part III: Stable Isotope Techniques 13. Application of stable isotope techniques to inorganic and biogenic carbonates. Emi Ito 351 Introduction Nomenclature and systematics of lake-water Mg/Ca and Sr/Ca ratios of lake-water of dissolved inorganic carbon (DIC) Carbonates in lake-sediments Mollusks Ostracodes Charaphytes Isotope analysis Preparation of carbonate samples for isotope analysis Conclusions Summary Acknowledgments References 14. Carbon and oxygen isotope analysis of lake sediment cellulose: methods and applications. Brent B. Wolfe, Thomas W. D. Edwards, Richard J. Elgood & Kristina R. M. Beuning 373 xi Introduction Stable isotope tracers in lake Historical development Methods Key criteria for paleohydrologic reconstruction Applications Future research directions Summary Acknowledgements References Nitrogen isotopes in palaeolimnology. Michael R. Talbot 15. 401 Introduction Nitrogen in lakes: forms and distribution Nitrogen isotopes Nitrogen isotope studies in palaeolimnology: sampling and measurement Some examples Closing remarks Summary Acknowledgments References Glossary, acronyms and abbreviations 441 Index 493 xiii PREFACE The explosive growth of paleolimnology over the past two decades has provided impetus for the publication of this series of monographs detailing the numerous advances and new techniques being applied to the interpretation of lake histories. This is the second volume in the series and deals mainly with physical and geochemical analytical techniques.
Author: H. John B. Birks
Publisher: Springer Science & Business Media
ISBN: 9400727453
Category : Science
Languages : en
Pages : 751
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Book Description
Numerical and statistical methods have rapidly become part of a palaeolimnologist’s tool-kit. They are used to explore and summarise complex data, reconstruct past environmental variables from fossil assemblages, and test competing hypotheses about the causes of observed changes in lake biota through history. This book brings together a wide array of numerical and statistical techniques currently available for use in palaeolimnology and other branches of palaeoecology. ​ Visit http://extras.springer.com the Springer's Extras website to view data-sets, figures, software, and R scripts used or mentioned in this book.
Author: Geological Association of Canada
Publisher:
ISBN:
Category : Agassiz, Lake
Languages : en
Pages : 472
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