Variations of Diatom Assemblages in Late Quaternary Sediments from the East Antarctic Continental Shelf PDF Download

Author: Carys Cook
Publisher:
ISBN:
Category : Antarctica
Languages : en
Pages : 138

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Book Description

Author: J. Ehlers
Publisher: Elsevier
ISBN: 008047408X
Category : Science
Languages : en
Pages : 390

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Book Description
This book is the last of three volumes in which the recent knowledge of the extent and chronology of Quaternary glaciations has been compiled on a global scale. This information is seen as a fundamental requirement, not only for the glacial community, but for the wider user-community of general Quaternary workers. In particular the need for accurate ice-front positions is a basic requirement for the rapidly growing field of palaeoclimate modelling. In order to provide the information for the widest-possible range of users in the most accessible form, a series of digital maps was prepared. The glacial limits were mapped in ArcView, the Geographical Information System (GIS) used by the work group. Included with the publication is a CD with digital maps, showing glacial limits, end moraines, ice-dammed lakes, glacier-induced drainage diversions and the locations of key sections through which the glacial limits are defined and dated. Where controversial interpretations are possible, such as for High Asia, they are indicated. All information on Quaternary glaciations worldwide is presented for the first time in a uniform format, including the mountain glaciations of regions such as Costa Rica, Ethiopia or Taiwan. The digital maps in this volume cover Latin America, Asia, Africa, Australasia, Antarctica. Both overview maps and more detailed maps at a scale 1: 1,000,000 are provided. Also available: Part I: Europe, ISBN 0-444-51462-7 Part II: North America, ISBN 0-444-51592-5

Author: R. M. Cline
Publisher: Geological Society of America
ISBN: 0813711452
Category : Science
Languages : en
Pages : 636

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Book Description

Author: Cary Mock
Publisher: Newnes
ISBN: 0444536426
Category : Science
Languages : en
Pages : 3883

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Book Description
The second revised edition of the Encyclopedia of Quaternary Science, Four Volume Set, provides both students and professionals with an up-to-date reference work on this important and highly varied area of research. There are lots of new articles, and many of the articles that appeared in the first edition have been updated to reflect advances in knowledge since 2006, when the original articles were written. The second edition will contain about 375 articles, written by leading experts around the world. This major reference work is richly illustrated with more than 3,000 illustrations, most of them in colour. Research in the Quaternary sciences has advanced greatly in the last 10 years, especially since topics like global climate change, geologic hazards and soil erosion were put high on the political agenda. This second edition builds upon its award-winning predecessor to provide the reader assured quality along with essential updated coverage Contains 357 broad-ranging articles (4310 pages) written at a level that allows undergraduate students to understand the material, while providing active researchers with a ready reference resource for information in the field. Facilitates teaching and learning The first edition was regarded by many as the most significant single overview of Quaternary science ever, yet Editor-in-Chief, Scott Elias, has managed to surpass that in this second edition by securing even more expert reviews whilst retaining his renowned editorial consistency that enables readers to navigates seamlessly from one unfamiliar topic to the next

Author:
Publisher:
ISBN:
Category : Antarctica
Languages : en
Pages : 288

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Author: Fiona Jean Scott
Publisher: CSIRO Publishing
ISBN:
Category : Nature
Languages : en
Pages : 582

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Book Description
A comprehensive guide to the protists that live in the surface waters and sea-ice south of the Antarctic Polar Front.

Author: International Council of Scientific Unions. Scientific Committee on Antarctic Research
Publisher: Cambridge University Press
ISBN: 9780521480338
Category : Nature
Languages : en
Pages : 912

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Book Description
The study of Antarctic communities can provide a valuable step forward in investigating the control of community development, the utilization of habitats and the interaction among species in both species rich and species poor communities. This book contains chapters characterizing the present approaches to both aquatic and terrestrial communities in the Antarctic. From biodiversity to trophic flows, from ecophysiological strategies to the impacts of environmental change and the effects of human disturbance, this volume provides an up to the minute overview of community studies in an area covering ten percent of the Earth's surface.

Author: Fiona Taylor
Publisher:
ISBN:
Category : Diatoms
Languages : en
Pages : 568

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Author:
Publisher:
ISBN:
Category : Arctic regions
Languages : en
Pages : 650

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Book Description

Author: David Michael Harwood
Publisher:
ISBN:
Category : Diatoms
Languages : en
Pages : 1190

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Book Description
Abstract: The history of Cenozoic ice sheets in Antarctica has been interpreted largely from deep-sea data. A new approach, which provides a more direct evaluation of Antarctic ice history, involves the examination of reworked diatom assemblages in the Sirius Formation tillites. These diatoms originate from subglacial sedimentary basins in East Antarctica and indicate periods of relative warmth, ice sheet retreat and the repeated presence of marine seaways/embayments in the continental interior during the Cenozoic. Antarctic ice-minima conditions are indicated by marine diatoms and other microfossils recovered from Sirius Formation localities spread over 1300 km in the Transantarctic Mountains. The modern distribution and temperature limits of several Pliocene diatoms recovered from the Sirius Formation indicate marine water as warm as 2̃°-5°C in the antarctic interior to at least 85°S latitude. Geologic time intervals not represented by microfossils in the Sirius Formation may indicate times of extensive ice development. The glacial history these microfossils suggest is substantiated by comparison to global sea-level and benthic foraminiferal oxygen isotope data. A detailed analysis of isotopic and eustatic records, together with Sirius Formation data, indicate ice-minima conditions and relative warmth, with marine seaways across Antarctica, during the Pliocene (5̃ to 2.5 Ma), middle Miocene (1̃7 to 14 Ma), late Oligocene/early Miocene (2̃7 to 23 Ma) and during much of the early Oligocene and remaining Paleogene. Glaciations are indicated during the late Oligocene (3̃1 to 27 Ma), late Miocene (1̃0 to 5 Ma) and Pleistocene (2̃.5 Ma to present). Bottom-water/ice-shelf events, recognized in a detailed comparison of eustatic and benthic oxygen isotopic data, preceed late Oligocene and late Miocene ice-sheet growth by 5̃ million years. Analysis of diatom biostratigraphy and paleoecology from numerous in situ Oligocene through Pliocene sedimentary outcrops and drill-holes around the Antarctic periphery have aided dating of the above reworked microfossils and have documented glacial and marine fluctuations in more uniform environments. Of particular significance is the recovery of upper Oligocene glacial-marine sediments in the MSSTS-1 drill-hole, the oldest known from Antarctica.