Xem 1-11 trên 11 kết quả Stratigraphical
  • This volume presents the results of research on Arabian continental vertebrates discovered in the United Arab Emirates, the Sultanate of Oman, and the Republic of Yemen. The contributors provide information on Arabian palaeontology, stratigraphical, geological, isotropic and palaeomagnetic topics.

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  • This report is based on fossil collections made over a vast area of the Canadian Arctic extending from Axel Heiberg Island in the north to the Aklavik region of the mainland and is a further contribution by the author on the Jurassic faunas of the Canadian Arctic. Detailed study of these ammonite faunas permits correlation of the associated Jurassic rocks and shows their faunal and stratigraphic relationships with Alaska, East Greenland, and the Arctic areas of Europe and Asia.

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  • CHAPTER TWO Recent revisions to the early Paleozoic time scale have been used to recalibrate ages assigned to stratigraphically dated paleomagnetic poles of that era. In particular, a value of 545 Ma has been used for the base of the Cambrian. Selected poles have then been used to derive apparent polar.

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  • This book could never have been written without the help, assistance, and encouragement of many people. During the research phase, Professor Alex Kemp and Dr. Richard Perren of the University of Aberdeen gave unstinting help and advice, while Professor Roger Wootton of the City University was generous with ideas and sources. Mr. John Westwood of Douglas–Westwood Associates kindly read the draft.

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  • In the last two decades, the discovery of signaling roles of ROS demonstrated their universal use in biological systems. The third section of this book, entitled “Reactive Species as Signaling Molecules” contains the chapters covering clear ROS-based signaling in yeasts and plants. It is not strange that many authors provide readers with the information gained from yeasts. This is a very popular classic eukaryotic model system to disclose molecular mechanisms of cellular responses to oxidative stress (Lushchak, 2010). In the first chapter of this book section, M. A.

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  • A lot of unconformities and stratigraphic gaps have been discovered in the Paleozoic and  Mesozoic  stratigraphy  of  Bac  Bo  region  (North  Viet  Nam),  but  their  role  in  the  regional  geology  was  not  accessed  yet  in  detail.  This  paper  is  the  first  attempt  to  describe  the  most  significant  unconformities  and  stratigraphic  gaps  and  discussing  their  role  in  regional  geology.

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  • The Upper Jurassic deposits of Milne Land lie in a key area for Jurassic Boreal ammonite stratigraphy. Early collections brought back to Copenhagen by Rosenkrantz (1929) and Aldinger (1935) were described in two classical monographs by Spath (1935, 1936), and all these works continue to form the basis for subsequent stratigraphical and palaeontological revisions. Since then extensive field work and collecting have yielded important new material and much more detailed stratigraphical information (Callomon, 1961; Hikansson et al., 1971; Birkelund et al.

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  • absolute pollen frequency (APF) *Pollen data from sediments, expressed in terms of the absolute numbers for each *species, *genus, or *family, per unit volume of sedi- ment and, where deposition rates are known, per unit time. In certain circumstances this approach gives clearer information than does the traditional way of expressing pollen data as *relative pollen frequencies (RPFs). APFs are particularly useful in site comparisons in which one or more high pollen producers vary.

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  • The Holocene coastal zone of Mekong river plain is the result of prolonged marinefluvial interaction. Lithofacies association in time and space is characterized by three depositional system tract belonged to the upper part of a sequence stratigraphy. Based on lithology should be divided 5 sedimentary types and 18 lithofacies distributed in stratigraphical column and in sea bottom varying from 25m water depth to mainland coastal area. According to

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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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  • Tham khảo sách 'fossil vertebrates of arabia_1', nông - lâm - ngư, nông nghiệp phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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