Lower To Middle Devonian Acritarchs Of The Moose River Basin Ontario
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Lower to Middle Devonian Acritarchs of the Moose River Basin, Ontario by Geoffrey Playford Pdf
"In this report the author describes 53 species of acritarchs distributed among 24 genera. In addition to providing data useful for stratigraphic correlation of marine and nonmarine sequences, the current study provides the first account of acritarch suites from a Lower to Middle Devonian sequence in North America." --
Sedimentary Cover of the Craton in Canada by D.F. Stott,J.D. Aitken Pdf
The early chapters of the volume present data and interpretations of the geophysics of the craton and summarise, with sequential maps, the tectonic evolution of the craton. The main body of the text and accompanying plates and figures present the stratigraphy, structural history, and economic geology of specific sedimentary basins and regions. The volume concludes with a summary chapter in which the currently popular theories of cratonal tectonics are discussed and the unresolved questions are identified.
The rapid evolution of terrestrial ecosystems in the Devonian Period combined with climate change and many global events had a pronounced influence on sedimentation and biodiversity in various terrestrial and marine settings. This volume presents a number of case studies which cover the following topics land-sea transitional settings, the role of ecological-evolutionary subunits, the diversity and palaeoecology of reef building organisms and microfloras with respect to sedimentary processes and global events.
Ecosystem Dynamics in a Polar Desert by Anonim Pdf
Presents information from the primary abiotic forces defining the system, and from the present hydrology, biogeochemistry and physics of major sites of organic carbon production of the McMurdo Dry Valleys. Additionally, research on the physical, chemical, and biological properties of the dry valley soils is included. The role of environmental management in long-term ecological studies is also addressed. The accompanying CDROM provides details and scale to visualize the McMurdo Dry Valleys from an ecosystem perspective.
Author : R. T. Becker, 1st,C. E. Brett,P. Königshof, 2nd Publisher : Geological Society of London Page : 481 pages File Size : 48,8 Mb Release : 2016-10-20 Category : Science ISBN : 9781862397347
Devonian Climate, Sea Level and Evolutionary Events by R. T. Becker, 1st,C. E. Brett,P. Königshof, 2nd Pdf
The geological and palaeontological records of climate change and evolutionary events reflect Earth’s widely fluctuating climate systems. Past climates hold the clues to understanding future developments. In this context, research on linked climate, biodiversity and sea-level fluctuations of the Devonian contributes to the general knowledge of deep-time climate dynamics. A fruitful co-operation between the International Geoscience Programme IGCP 596 and the International Subcommission on Devonian Stratigraphy (SDS) addressed the complex succession of climate-linked Devonian global events of varying magnitude. The primary goal of IGCP 596 was to assess mid-Palaeozoic climate changes and their impact on marine and terrestrial biodiversity using an interdisciplinary approach. The focus of SDS includes a revision of the eustatic sea-level curve and the integration of refined chrono- and biostratigraphy with modern chemo-, magneto-, cyclo-, event- and sequence stratigraphy. This enabled the much improved dating and correlation of abiotic perturbations, evolutionary changes, organism and ecosystem ranges. Results by 37 authors are presented in 14 chapters, which cover the entire Devonian.
This book provides complete coverage of all aspects of the study of all fossil palynomorphs yet studied. It is a profusely illustrated treatment. The book serves both as a student text and general reference work. Palynomorphs yield information about age, geological and biological environment, climate during deposition, and other significant factors about the enclosing rocks. Extant spores and pollen are treated first, preparing the student for more difficult work with fossil sporomorphs and other kinds of palynomorphs. An appendix describes laboratory methods. The glossary, bibliographies and index are useful tools for study of the literature.
Early Palaeozoic Biogeography and Palaeogeography by D.A.T. Harper,T. Servais Pdf
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.
Canadian and Australian Devonian Spores by Duncan Colin McGregor,Geoffrey Playford,Geological Survey of Canada Pdf
This report details the discovery, in Middle and Upper Devonian sedimentary rocks of Australia, of certain species of terrestrial palynomorphs (spores) that were previously known from Canada.
Contributions to Canadian Paleontology by Murray John Copeland Pdf
This bulletin contains four papers that describe paleontological material such as the enigmatic genus Anomalocaris and the possible arthropod Tuzoia, from Lower Cambrian strata near Cranbrook, British Columbia, and Lower to Middle Devonian conodonts from the Moose River Basin, Northern Ontario. New information is given about the Visean rugose coral, Ankhelasma, and a detailed account of fungal palynomorphs from the Paleogene of Yukon Territory is presented.
