Aeolian Dust and Dust Deposits - 1st Edition - ISBN: 9780125686907, 9781483289014

Aeolian Dust and Dust Deposits

1st Edition

Authors: Kenneth Pye
eBook ISBN: 9781483289014
Imprint: Academic Press
Published Date: 28th January 1987
Page Count: 334
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Description

Aeolian Dust and Dust Deposits explores the entrainment, dispersion, and deposition of aeolian dust and dust deposits, with emphasis on transport and deposition of dust derived by deflation of surface sediments and soils. Topics covered range from the mechanisms of fine-particle formation to dust sources, sinks, and rates of deposition. Dust-transporting wind systems are also discussed, along with the grain size, mineralogy, and chemical composition of aeolian dust.

Comprised of nine chapters, this book begins with an overview of the general nature and significance of windborne dust as well as the importance of aeolian dust and loess. The next chapter deals with the mechanisms underlying the formation of fine particles, including glacial grinding, frost and salt weathering, and fluvial comminution. The reader is then introduced to dust entrainment, transport, and deposition, together with dust sources, sinks, and rates of deposition. Subsequent chapters focus on the implications of dust deflation, transport, and deposition; dust deposition in the oceans; and loess distribution and the thickness and morphology of loess deposits.

This monograph is written primarily for research workers and advanced students in sedimentology, geomorphology, and Quaternary studies, but is also likely to be of value to soil scientists, meteorologists, planetary geologists, engineers, and others concerned with environmental management.

Table of Contents


Preface

1 The General Nature and Significance of Windborne Dust

1.1 The Nature of Aeolian Dust

1.2 Sources of Dust

1.3 Previous Studies of Aeolian Dust and Dust Deposits

1.4 The Importance of Aeolian Dust and Loess

2 Mechanisms of Fine-Particle Formation

2.1 Release of Particles from Fine-Grained Parent Rocks

2.2 Glacial Grinding

2.3 Frost Weathering

2.4 Fluvial Comminution

2.5 Aeolian Abrasion

2.6 Salt Weathering

2.7 Combined Salt and Frost Action

2.8 Chemical Weathering

2.9 Insolation Weathering

2.10 Fine Particles of Biological Origin

2.11 Formation of Clay Pellets

2.12 The Relative Importance of Different Particle Formation Mechanisms

3 Dust Entrainment, Transport and Deposition

3.1 Particle Forces

3.2 Particle Entrainment

3.3 Dispersion of Dust Deflated from the Earth's Surface

3.4 Dispersion of Dust from Volcanic Eruptions

3.5 Dust Deposition

4 Dust Sources, Sinks and Rates of Deposition

4.1 Global Dust Sources

4.2 Types of Terrain Favourable for Dust Deflation

4.3 Global Dust Sinks

4.4 Dust Concentrations in the Air

4.5 Annual Frequency of Modern Dust Storms

4.6 Rates of Dust Deposition Estimated from Ocean Cores

4.7 Rates of Continental Dust Deposition

5 Dust-Transporting Wind Systems

5.1 Dust Devils

5.2 Downdraught Haboobs

5.3 Dust Storms Associated with Steep Pressure Gradients and Low-Level Troughs

5.4 Dust-Transporting Wind Systems in West Africa

5.5 Dust Storms Associated with Depressions and Cold Fronts

5.6 Long-Range Transport of Dust by Jet Streams

5.7 Transport of Dust Over the British Isles and Continental Europe

5.8 Fohn and Valley Winds

6 Grain Size, Mineralogy and Chemical Composition of Aeolian Dust

6.1 Grain Size of Suspended Dust above a Wind-Eroded Surface

6.2 Grain Size of Aeolian Dust Transported Over Relatively Short Distances

6.3 Grain Size of Far-Travelled Dust

6.4 Mixtures of Local and Far-Travelled Dust

6.5 Mineral Composition of Dust

6.6 Chemical Composition of Dust

6.7 Oxygen Isotope Ratios of Quartz in Dust

6.8 Magnetic Differentiation of Atmospheric Dusts

7 Implications of Dust Deflation, Transport and Deposition

7.1 Deflation Problems

7.2 Prediction of Soil Erosion by Wind

7.3 Problems Associated with the Transport of Sand and Dust

7.4 Implications of Dust Deposition

8 Dust Deposition in the Oceans

8.1 The Effect of Dust Deposition on the Composition of Modern Ocean Sediments

8.2 Oceanic Dust Deposition During the Late Cenozoic

8.3 Record of Quaternary Dust Deposition Preserved in Ice Cores

9 Loess

9.1 Definition of Loess

9.2 Loess Distribution

9.3 Thickness and Morphology of Loess Deposits

9.4 Physical and Chemical Properties of Loess

9.5 Loess Landforms

9.6 Theories of Loess Origin

9.7 Stages in the Formation of Loess

9.8 Quaternary History of Loess Deposition

References

Index

Details

No. of pages:
334
Language:
English
Copyright:
© Academic Press 1987
Published:
Imprint:
Academic Press
eBook ISBN:
9781483289014

About the Author

Kenneth Pye

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