Download or read book Sponges of the Middle Cambrian Burgess Shale and Stephen Formations British Columbia written by J. Keith Rigby and published by ROM. This book was released on 2004 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sponges of the Burgess Shale Middle Cambrian British Columbia written by J. Keith Rigby and published by Calgary, Alta. : Canadian Society of Petroleum Geologists ; Toronto, Ont. : Geological Association of Canada. This book was released on 1986 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cambrian Geology and Paleontology written by Charles Doolittle Walcott and published by . This book was released on 1924 with total page 770 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book FOSSILS OF BURGESS SHALE PB written by BRIGGS D and published by Smithsonian. This book was released on 1995-06-17 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since its discovery in 1909 by Charles Doolittle Walcott, then Secretary of the Smithsonian Institution, the Burgess Shale in the Canadian Rocky Mountains has fascinated both scientists and the public with its plethora of weird wonders - life forms of the past so unfamiliar they cannot easily be assigned to known taxonomic groups. This century's most significant invertebrate fossil discovery, the Burgess Shale provides an unprecedented window into the explosive evolution during the Cambrian period that began about 540 million years ago, one of the most enigmatic episodes in the history of life. This book provides the first comprehensive set of illustrations of the extraordinary life forms revealed in the Burgess Shale. In addition to the more common fossilized hard skeletons, the Burgess Shale preserved the soft parts of these organisms, which provide a key to understanding the early evolution of the major groups of animals that inhabit the earth today. The Fossils of the Burgess Shale shows much remarkable detail - including digestive tracts and other internal organs - of creatures preserved in particles of mud fine enough to penetrate every crack and unevenness. The book begins with the history of exploration and research in the Burgess Shale, the geologic setting and preservation of the fossils, and a discussion of the Cambrian radiation, the period when almost all the major phyla of animals evolved. These introductory chapters are followed by 199 high-quality photographs and line drawings with detailed species accounts that describe important features of each specimen, as well as the ecology and taxonomy of each group. A complete list of all currently accepted species described from the Burgess Shale and a comprehensive bibliography follow the illustrations. The Fossil of the Burgess Shale is a compendium of fascinating Cambrian treasures that offer a rare glimpse into the nature of early life on our planet. They have figured prominently in recent evolutionary debates. The National Museum of Natural History, which houses more than 65,000 fossils collected by Walcott from the Burgess Shale, will open a new exhibition of the specimens in 1995.
Download or read book Cambrian Formations of the Robson Peak District British Columbia and Alberta Canada with Plates 55 59 written by Charles Doolittle Walcott and published by . This book was released on 1914 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nomenclature of Some Cambrian Cordilleran Formations written by Charles Doolittle Walcott and published by . This book was released on 1924 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Conference on the Cambrian Explosion written by Paul A. Johnston and published by . This book was released on 2011 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Early Palaeozoic Biogeography and Palaeogeography written by D.A.T. Harper and published by Geological Society of London. This book was released on 2014-01-27 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Early Palaeozoic was a critical interval in the evolution of marine life on our planet. Through a window of some 120 million years, the Cambrian Explosion, Great Ordovician Biodiversification Event, End Ordovician Extinction and the subsequent Silurian Recovery established a steep trajectory of increasing marine biodiversity that started in the Late Proterozoic and continued into the Devonian. Biogeography is a key property of virtually all organisms; their distributional ranges, mapped out on a mosaic of changing palaeogeography, have played important roles in modulating the diversity and evolution of marine life. This Memoir first introduces the content, some of the concepts involved in describing and interpreting palaeobiogeography, and the changing Early Palaeozoic geography is illustrated through a series of time slices. The subsequent 26 chapters, compiled by some 130 authors from over 20 countries, describe and analyse distributional and in many cases diversity data for all the major biotic groups plotted on current palaeogeographic maps. Nearly a quarter of a century after the publication of the ‘Green Book’ (Geological Society, London, Memoir12, edited by McKerrow and Scotese), improved stratigraphic and taxonomic data together with more accurate, digitized palaeogeographic maps, have confirmed the central role of palaeobiogeography in understanding the evolution of Early Palaeozoic ecosystems and their biotas.
Download or read book A New Silurian Llandovery Telychian Sponge Assemblage from Gotland Sweden written by Freek Rhebergen and published by John Wiley & Sons. This book was released on 2014-02-27 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: A newly discovered, diverse sponge fauna of early Silurian age, is described from Gotland, Sweden. This is the first Silurian sponge assemblage known from Baltica, and the only diverse Llandoverian assemblage known worldwide. The fauna includes 20 genera and 29 species, of which three genera and six species are new. Eighteen species are new to Baltica. The fauna shows strong similarities to later Silurian assemblages in Arctic Canada, but one endemic species comprises ca. 50% of the fauna. The fauna shows that lithistid sponges recovered well from the late Ordovician extinction in some areas, and became widely spread in the early Silurian. In contrast, non-lithistid sponges like, such as hexactinellids, appear to have evolved rapidly during the Late Ordovician – early Silurian interval, and some modern groups probably originated in inshore habitats.
Download or read book The Middle Cambrian Burgess Shale and Its Relationship to the Stephen Formation in the Southern Canadian Rocky Mountains written by T. P. Fletcher and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cambrian and Ozarkian Brachiopoda Ozarkian Cephalopoda and Notostraca with Plates 106 to 126 written by Charles Doolittle Walcott and published by . This book was released on 1924 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fossils of the Middle Cambrian Burgess Shale British Columbia written by and published by . This book was released on 2001 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geological Formations of Beaverfoot Brisco Stanford Range British Columbia Canada written by Charles Doolittle Walcott and published by . This book was released on 1928 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Smithsonian Miscellaneous Collections written by and published by . This book was released on 1920 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Burgess Shale written by Harry Blackmore Whittington and published by . This book was released on 1985 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Molecular Biomineralization written by Werner E. G. Müller and published by Springer Science & Business Media. This book was released on 2011-08-30 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: The concept of ‘biomineralization’ signifies mineralization processes that take place in close association with organic molecules or matrices. The awareness that mineral formation can be guided by organic molecules notably contributed to the understanding of the formation of the inorganic skeletons of living organisms. Modern electron microscopic and spectroscopic analyses have successfully demonstrated the participation of biological systems in several mineralization processes, and prominent examples include the formation of bio-silica in diatoms and sponges. This insight has already made the application of recombinant technology for the production of valuable inorganic polymers, such as bio-silica, possible. This polymer can be formed by silicatein under conditions that cannot be matched by chemical means. Similarly, the efforts described in this book have elucidated that certain organisms, bacteria in deep-sea polymetallic nodules and coccoliths in seamount crusts, are involved in the deposition of marine minerals. Strategies have already been developed to utilize such microorganisms for the biosynthesis and bioleaching of marine deposits. Moreover, studies reveal that bio-polymers enhance the hydroxyapatite formation of bone-forming cells and alter the expression of important regulators of bone resorption, suggesting a potential for bone regeneration and treatment / prevention of osteoporosis.
Download or read book Wonderful Life The Burgess Shale and the Nature of History written by Stephen Jay Gould and published by W. W. Norton & Company. This book was released on 1989 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explains why the diversity of the Burgess Shale is important in understanding our past and evolution.
