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Product details
File Size: 3225 KB
Print Length: 285 pages
Page Numbers Source ISBN: 0520249755
Publisher: University of California Press; 1 edition (June 30, 2008)
Publication Date: June 15, 2008
Sold by: Amazon Digital Services LLC
Language: English
ASIN: B0050QVOB8
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I found this book to be an excellent introduction to radiometric dating methods. The author not only presents good explanations for how the methods were developed and how they are used but also discusses the scientists involved. This provides the reader with a lot of "color" commentary that keeps a rather dry subject interesting. What comes across repeatedly is the creativity and tenacity of the researchers as they hypothesize, create then refine the various techniques.
Almost everyone has heard of radiocarbon dating, but it's applicable only for the last 50-thousand years or so. It's not common knowledge that much greater intervals of time can now be dated accurately. Doug Macdougall's Nature's Clocks offers a full and highly readable account of how scientists can date materials that formed many billions years ago. I found the book hard to put down.Many students in earth science classes have been exposed to the geological Eras and Periods and these are properly and succinctly covered in the book. But that record is based on fossil evidence that extends only about 600 million years back, almost one-millionth of the earth's age. What happened before, and when?Early consideration of the earth's age was based on biblical inferences and many people still subscribe to a faith based view. But objective treatments of earth's history began in the eighteenth century with James Hutton's Theory of the Earth, with Proofs and Illustrations. Hutton evaluated geological evidence but he and later geologists lacked objective measures of time. It was late nineteenth and early twentieth century advances in chemical and physical knowledge of heavy metals and radioactive decay that established the basis for modern techniques of determining ages of formation. Key players are identified in the development of these fantastically sensitive methods and the principles underlying each are explained. The relevance of dating materials to understanding the evolutionary and geological history of man is reviewedThere are no serious omissions in Macdougall's treatment; even the mathematical basis of measuring time via radioactive decay is simply and well explained although understanding the maths is unnecessary to enjoy and understand the book. Creationists take note: Nature's Clocks offers irrefutable evidence in support of stellar and biological evolution because the underlying phenomena can be measured and dated.
We've all certainly read or heard of newspaper or magazine articles describing a new kind of fossil, maybe a dinosaur, and the article almost always includes a reference to the age of that fossil.If you have ever wondered how scientists determine the ages of things then this is the book for you.McDougall does a superb job of presenting and discussing the highly technical field of radiometric dating in a way that allows scientists and non-scientists alike to enjoy the ride. MacDougall hooked me in the first chapter...OK...imagine this, hikers are traversing a glacier and they come across what looks like a mummified(?) person with half of its body exposed to the air and the other half frozen into the glacier itself. The hikers don't know what to make of this situation. When the find is described and broadcast paleontologists descend on the site and discover an ancient human frozen into the ice, extremely well preserved, but now partially exposed to the elements. Questions soon arise: Who was this individual? How did s/he become frozen in the ice? When did s/he die? The stage is now set for MacDougall to explain how scientists determine the ages of things.MacDougall does a masterful job of presenting scientifically complex ideas in clear, concise, and extremely readable prose. Not only that, but he pulls it off in a way that just about anyone can follow along and make sense of what there is to know about radiometric and other methods of determing the absolute ages of things.I particularly enjoyed the historical context MacDougall provides when he introduces a new topic or method. For example, he starts by describing the discovery of radioactivity and progresses through early relatively inexact dating methods to the much more reliable and precise modern methods used today. And, since this book was publishd in 2008 he is able to include even cutting-edge methods.The book is of particular interest to me since I teach a college-level course in the nature of science, and course topics include the origin and age of the universe, the origin and age of the earth, and the evolutionary origins of the human body. While I already had a general understanding of radiometric dating, this book opened my eyes to the simplicity and complexity of methods used in the past and today to the work it takes to determine the ages of things.If you have ever wondered how scientists concluded that the earth is about 4.5 billion years old, or how they determine the ages of rocks, fossils, or pretty much anything else, then this book is for you.MacDougall amazingly manages to address this topic in a comfortable 238 pp. of text, followed by some appendicies, and a glossary of terms, just in case you need to check something out.This is a five-star read all the way! As soon as I finished I was sending out emails to colleagues telling them of my lucky find!Thanks Doug! You've done a brilliant job!
This book gives a good account of the development of radiometric dating and the many uses for it. By the way, don't be swayed by reviewers that can't even write out God (G-d) as somebody that is not religious and thinks the book omits .... something. What are omitted are the "assumption arguments" of the religious apologists. The book actually did clarify inaccuracies, assumptions and corrective methods.
An excellent description of the methods used to measure the time intervals of earth's history. It is written for the person who does not have a background in earth science by an author is has an excellent background and a great ability to put complicated science into terms any one can understand and does so with a pleasant sense of humor.
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