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The principal aim of this book is to provide a wide range of information and a useful reference for researchers interested to investigate heavy mineral assemblages in different geological settings and for a variety of purposes. The methodological developments achieved in recent years for the identification of heavy minerals in a wide grain-size range are illustrated. All factors that affect heavy mineral concentration and relative proportions, including hydraulic sorting, mechanical abrasion, chemical weathering, and post-depositional dissolution, and all factors able to introduce analytical, environmental, or diagenetic bias are thoroughly addressed. A proper integration of multiple techniques including bulk sediment, multi-mineral, and single-mineral methods are discussed by renowned authors in their invited contributions.
A new edition of the veteran science writer's groundbreaking work on the world's water crisis, featuring all-new reporting from the most recent global flashpoints Throughout history, rivers have been our foremost source of fresh water for both agriculture and individual consumption, but looming water scarcity threatens to cut global food production and cause conflict and unrest. In this visionary book, Fred Pearce takes readers around the world on a tour of the world's rivers to provide our most complete portrait yet of the growing global water crisis and its ramifications for us all. With vivid on-the-ground reporting, Pearce deftly weaves together the scientific, economic, and historic dimensions of the water crisis, showing us its complex origins--from waste to wrong-headed engineering projects to high-yield crop varieties that have saved developing countries from starvation but are now emptying their water reserves. Pearce argues that the solution to the growing worldwide water shortage is more efficiency and a new water ethic based on managing the water cycle for maximum social benefit rather than narrow self-interest.
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