Download or read book Lithology Trace Fossils and Correlation of Precambrian Cambrian Boundary Beds Cassiar Mountains North Central British Columbia written by William Harold Fritz and published by Geological Survey of Canada. This book was released on 1985 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Trace fossils from the upper part of the Stelkuz formation (609m +) and from the overlying Boya Formation (400.5 m) permit atentative definition of the Precambrian-Cambrian boundary in theCassiar Mountains. The strata investigated are below the top ofthe Lower Cambrian Fallotaspis Zone, a level located 1.5 m abovethe upper contact of the Boya Formation. The Precambrian-Cambrian boundary is tentatively placed 592 m below this level ata disconformity within the Stelkuz Formation. Correlations withother boundary strata in the Canadian Cordillera suggest theoptimum area for further testing ichnofossil ranges is in theMackenzie Mountains. Intercontinental correlations are alsoattempted.
Download or read book Lithology Trace Fossils and Correlation of Precambrian cambrian Boundary Beds Cassiar Mountains North central British Columbia written by Geological Survey of Canada and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book LITHOLOGY TRACE FOSSILS AND CORRELATIONS OF PRECAMBRIAN CAMBRIAN BOUNDARY BEDS CASSIAR MOUNTAINS NORTH CENTRAL BRITISH COLUMBIA written by Geological Survey of Canada and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Ancient Western North American Margin written by L. C. Struik and published by . This book was released on 1987 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent work in the North American Cordillera emphasized the differencesbetween fault-bounded blocks of stratigraphy and as a consequence, theCordillera was subdivided into terranes. In east-central British Columbia, 5fault-bounded terranes are distinguished by their unique stratigraphy. Thispaper interprets the palinspastic geology of those terranes and how theycould come together, then showing that the terranes of east-centralCordillera were probably separated by highlands rather than oceans. Modifications to Trumpy's (1960) model for the Alps are discussed, thestratigraphy of the terranes summarized, and the Triassic palinspasticcross-section described. Finally the reconstruction of the Precambrian toPaleozoic western Canadian margin are discussed by relating the stratigraphyof the eastern Cordilleran terranes to the possible tectonic events thatcreated them.
Download or read book Geology of the Precambrian Superior and Grenville Provinces and Precambian Fossils in North America written by S.B. Lucas and published by Geological Society of America. This book was released on 1998 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains a description of the geology and mineral deposits of the Superior Province of the Canadian Shield, an overview of Grenville Province geology, and a synopsis of Precambrian fossil occurrences in North America. Six large plates include a geological map of Canada, geological map of the Grenville Province, lithotectonic map of the Superior Province, Archean mineral deposit map of the Superior Province, and more.
Download or read book Origin and Early Evolution of the Metazoa written by Jere H. Lipps and published by Springer Science & Business Media. This book was released on 2013-11-21 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several years ago, we realized that the most prominent ideas that had been ex pressed about the origin and early evolution of the Metazoa seemed to have been developed chiefly by zoologists using evidence from modern species without reference to the fossil record. Paleontologists had, in fact, put forth their own ideas but the zoological and the paleontological evidence were about the problem, seldom considered together, especially by zoologists. We believed that the paleon tological documentation of the first Metazoa was too scattered, too obscure to Western readers, and much of it too recent to have been readily available to our colleagues in zoology. Whether or not that was entirely true, we thought that a single volume reviewing the fossil record of the earliest Metazoa would be useful to many in both paleontology and zoology, especially since so much new informa tion has been developed in the last few years. Some of this information has been summarized in general articles recently, but an overview of most of the field does not exist. We therefore organized this book in five parts so that the evidence could be placed in perspective and summarized and inferences made from it. Part I intro duces the previous hypotheses that have been proposed for the origin and early radiation of Metazoa. Part II consists of two summary chapters that set the sedi mentological, geochemical, and biological background to the known radiations of Metazoa.
Download or read book Trace Fossils written by William Miller III and published by Elsevier. This book was released on 2011-10-13 with total page 637 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book serves as an up-to-date introduction, as well as overview to modern trace fossil research and covers nearly all of the essential aspects of modern ichnology. Divided into three section, Trace Fossils covers the historical background and concepts of ichnology, on-going research problems, and indications about the possible future growth of the discipline and potential connections to other fields. This work is intended for a broad audience of geological and biological scientists. Workers new to the field could get a sense of the main concepts of ichnology and a clear idea of how trace fossil research is conducted. Scientists in related disciplines could find potential uses for trace fossils in their fields. And, established workers could use the book to check on the progress of their particular brand of ichnology. By design, there is something here for novice and veteran, insider and outsider, and for the biologically-oriented workers and for the sedimentary geologists. * Presents a review of the state of ichnology at the beginning of the 21st Century* Summarizes the basic concepts and methods of modern trace fossil research* Discusses crucial background information about the history of trace fossil research, the main concepts of ichnology, examples of current problems and future directions, and the potential connections to other disciplines within both biology and geology
Download or read book Geology of the Midway Cassiar Area Northern British Columbia 1040 104P written by John Allan Bradford and published by . This book was released on 1993 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Midway-Cassiar project area covers approximately 3,000 sq km in the Cassiar Mountains of northern British Columbia, between the Dease River and the Yukon border near Rancheria. This study began in 1986 as one of several regional mapping projects to produce detailed geological maps of the area. This report describes the history of exploration and mining in the area and previous geological work; general geology; structural geology and metamorphism; and economic geology.
Download or read book The Trace Fossil Record of Major Evolutionary Events written by M. Gabriela Mángano and published by Springer. This book was released on 2016-11-17 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume addresses major evolutionary changes that took place during the Ediacaran and the Paleozoic. These include discussions on the nature of Ediacaran ecosystems, as well as the ichnologic signature of evolutionary radiations, such as the Cambrian explosion and the Great Ordovician biodiversification event, the invasion of the land, and the end-Permian mass extinction. This volume set provides innovative reviews of the major evolutionary events in the history of life from an ichnologic perspective. Because the long temporal range of trace fossils has been commonly emphasized, biogenic structures have been traditionally overlooked in macroevolution. However, comparisons of ichnofaunas through geologic time do reveal the changing ecology of organism-substrate interactions. The use of trace fossils in evolutionary paleoecology represents a new trend that is opening a window for our understanding of major evolutionary radiations and mass extinctions. Trace fossils provide crucial evidence for the recognition of spatial and temporal patterns and processes associated with paleoecologic breakthroughs.
Download or read book Canadian Journal of Earth Sciences written by and published by . This book was released on 2010 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Trace Fossils Small Shelly Fossils and the Precambrian Cambrian Boundary written by Ed Landing and published by . This book was released on 1988 with total page 92 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 Geology of the Cordilleran Orogen in Canada written by Geological Survey of Canada and published by Geological Survey of Canada, 1992 [i.e. 1991]. This book was released on 1992 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Current Research Geological Survey of Canada written by and published by . This book was released on 1984 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Current Research written by Geological Survey of Canada and published by . This book was released on 1984 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: The document is a collection of research reports in the followingareas: economic geology, geochemistry, geophysics, marinegeoscience, paleontology, quatenary geology, regional geology, stratigraphy, and structural geology. Sections on scientific andtechnical notes, and discussions and communications are included.
Download or read book Bulletin of the National Museum of Natural Science written by and published by . This book was released on 1997 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mineral Deposits of Northern Cordillera written by James A. Morin and published by Published for the Geology Division of CIM ... by the Canadian Institute of Mining and Metallurgy. This book was released on 1986 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt:
