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This title is a comprehensive survey of maritime archaeology as seen through the eyes of nearly fifty scholars at a time when maritime archaeology has established itself as a mature branch of archaeology.
Provides a comprehensive overview of the U.S. coal industry over 20 years, with emphasis on the major changes that occurred, their causes, and their effects. Presents and analyzes data in terms of trends in production, consumption, distribution, and prices. Profitability of major energy companies' coal operations is also tracked. Over 100 charts, tables, graphs and photos.
"Search for lost Mayan cities and books of gold, discover an ancient canal system in Arizona, climb gigantic pyramids in the Midwest, explore megalithic monuments in New England, and join the astonishing quest for the lost cities throughout North [and Central] America"--Amazon.com.
Cave divers are the elite, and this is their story--a story of pushing the limits of technology and human endurance.
All serious divers should have this comprehensive manual in their library. Dozens of the foremost diving scientists, educators, and other professionals in the field have contributed to and reviewed this important volume. The 6th edition is vastly more robust than previous editions, and the MSRP is 10% less than previous editions - giving the reader more value for a lower price. This sixth edition of the NOAA Diving Manual builds on earlier editions, combining new developments in equipment and cutting-edge methods and procedures to provide a reference text that is useful for not only scientists but also all divers. New Chapters Advanced Platform Support – diving with ROVs/AUVs, submersibles, and atmospheric diving systems Underwater Photography and Videography Significantly revised and updated chapters include: Diving Equipment Procedures for Scientific Dives Rebreathers Polluted-Water Diving
"Who were the first humans to inhabit North America? According to the now familiar story, mammal hunters entered the continent some 12,000 years ago via a land bridge that spanned the Bering Sea and introduced the distinctive stone tools of the Clovis culture. Drawing from original archaeological analysis, paleoclimatic research, and genetic studies, noted archaeologists Dennis J. Stanford and Bruce A. Bradley challenge that narrative. Their hypothesis places the technological antecedents of Clovis technology in Europe, with the culture of Solutrean people in France and Spain more than 20,000 years ago, and posits that the first Americans crossed the Atlantic by boat and arrived earlier than previously thought."--Back cover.