Xem 1-11 trên 11 kết quả Paleontology
  • Laetoli in northern Tanzania is one of the most important paleontological and paleoanthropological sites in Africa. It is renowned for the recovery of early hominin fossils belonging to A. afarensis and for the discovery of remarkably well-preserved trails of footprints of hominins. Given the significance of Laetoli for understanding and interpreting the evolutionary history of early hominins the author initiated long-term geological and paleontological investigations at Laetoli and at other fossil localities on the Eyasi Plateau.

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  • You are giving a talk in front of a group of people. You’ve assembled all the relevant facts. You’ve planned it well, and your delivery is strong, but your audience doesn’t respond or, even worse, they are giving you a negative response. What went wrong? Well, it is probably not what you are saying out loud that matters. The problem stems from what your body says, or in other words, your body language. By body language I mean things as simple as the way you stand, or, say, folding your arms across your chest.

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  • Although Earth is billions of years old, geology—literally meaning the study of Earth—is a relatively new science, having grown from seeds of natural science and natural history planted during the Enlightenment era of the eighteenth and nineteenth centuries. In 1807, the founding of the Geological Society of London, the first learned society devoted to geology, marked an important turning point for the science (some say its nascence).

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  • Earth Science is made up of many different areas of geological study. Since the Earth contains everything from clouds (meteorology) and oceans (marine biology) to fossils (paleontology) and earthquakes (geology/plate tectonics), there is a lot to choose from!

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  • The first version of this text was written to serve as lecture notes for a first term geology course in “Minerals and Rocks” at Aarhus Universityin Denmarkin 2003. In Aarhus this course is accompanied by a general “Introduction to Geology” course that presents, for example, the structure of the Earth, plate tectonics and paleontology. These topics are therefore not treated here, and some knowledge of the Earth´s structure and plate tectonicsis assumed.

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  • Each of the following well-known Scholars reviewed one or more Chapters, and made valuable suggestions: C. C. ABBOTT, M.D., Author of "Primitive Industry." Prof. F. W. PUTNAM, Curator of Peabody Museum of Archaeology and Ethnology, Harvard University. A. F. BANDELIER, Explorer for Archaeological Institute of America, author of "Archaeological Tour in Mexico." Prof. CHARLES RAU, Curator of Archaeological Department of Smithsonian Institution. ALEXANDER WINCHELL, LL.D., Professor of Geology and Paleontology, University of Michigan. CYRUS THOMAS, PH.D., Of the Bureau of Ethnology. ...

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  • Research in anoxic environments is a relatively new and rapidly growing branch of science that is of general interest to many students of diverse microbial communities. The term anoxia means absence of atmospheric oxygen, while the term hypoxia refers to O 2 depletion or to an extreme form of “low oxygen.” Both terms anoxia and hypoxia are used in various contexts. It is accepted that the initial microorganisms evolved anaerobically and thrived in an atmosphere without oxygen. The rise of atmospheric oxygen occurred ~2.

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  • Since fossil vertebrates were first discovered at Porcupine Cave on the rim of South Park, Colorado, in 1981, the site has become the world’s most important source of information about animals that lived in the high elevations of North America in the middle part of the ice ages, between approximately one million and 600,000 years ago.

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  • This volume was developed from a symposium dedicated to Jack McIntosh presented at the 2001 Society of Vertebrate Paleontology annual meeting, which we convered with Dan Chure. We thank Jack McIntosh for allowing us to organize a symposium in his honor. We also thank the participants of that symposium, most of whom authored chapters in this volume, for their excellent papers and patience throughout the process of bringing this book to publication. We especially thank Blake Edgar (UC Press) for initially supporting this project and his continual guidance throughout....

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  • This extensively illustrated volume brings together for the first time the results of research on Arabian continental vertebrates discovered in the United Arab Emirates, the Sultanate of Oman, and the Republic of Yemen. Eminent scientists from Arabia, Europe, and the United States provide up-to-date information on Arabian paleontology as well as on Arabian stratigraphical, geological, isotopic, and paleomagnetic topics. The book presents new fossil records· from Arabia and Pakistan and discusses the closing of the ancient Middle East Tethy s seaway....

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  • Problems of nonholonomic mechanics, including many problems in robotics, wheeled vehicular dynamics and motion generation, have attracted considerable attention. These problems are intimately connected with important engineering issues such as path planning, dynamic stability, and control.Thus, the investigation of many basic issues, and in particular, the role of symmetry in such problems, remains an important subject today.

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