Download or read book Ordovician Conodont Biostratigraphy Western Canadian Cordillera written by Susanne Margarete Luise Pohler and published by Geological Survey of Canada. This book was released on 1990 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: A total of 116 conodont collections from Upper Cambrian to Upper Ordovician rocks in the western Canadian Cordillera are reported and documented.

Download or read book Ordovician Conodont Biostratigraphy Western Canada Cordillera written by S. M. L. Pohler and published by . This book was released on 1990 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ordovician to Triassic Conodont Paleontology of the Canadian Cordillera written by Geological Survey of Canada and published by . This book was released on 1991 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: This compilation is a synthesis of Ordovician-Triassic conodont research undertaken in the Canadian Cordillera during the past decade. The studies include an overview of the record in Western Canada; a review of the paleontology; and descriptions of conodonts from the Cordillera Road River group in northern Yukon Territory, from the eastern and northern Canadian cordillera, of the Palliser Formation in the Rocky Mountains, and from the Cache Creek Complex in south-central B.C.

Download or read book Conodonts and Conodont Biostratigraphy of the Middle Ordovician in the Western Overthrust Region and Sequatchie Valley of the Southern Appalachians written by Jack Charles Hall and published by . This book was released on 1986 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Symposium on Conodont Biostratigraphy written by Walter C. Sweet and published by Geological Society of America. This book was released on 1970-01-01 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Upper Cambrian to Lower Ordovician Conodont Biostratigraphy and Biofacies Rabbitkettle Formation District of Mackenzie written by Ed Landing and published by University of Toronto Press. This book was released on 1980 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conodonts have been recovered from two sections through the Cambrian-Ordovician boundary beds of the upper Rabbitkettle Formation, near the headwaters of the Broken Skull River, western Mackenzie Mountains. This report contributes towards a biofacies evaluation of Cambrian-Ordovician boundary bed conodonts and illustrates the probable limitations on a highly resolved conodont-based correlation of this interval between strongly constrasting lithofacies.

Download or read book Preliminary Conodont Biostratigraphy and Correlation of Lower to Middle Ordovician Carbonates of the St George Group Great Northern Peninsula Newfoundland written by Svend Sandbergh Stouge and published by St. John's, Nfld. : Mineral Development Division, Government of Newfoundland and Labrador. This book was released on 1982 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geological Survey of Canada Open File 2682 written by and published by Natural Resources Canada. This book was released on with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Taxonomy Evolution and Biostratigraphy of Conodonts from the Kechika Formation Skoki Formation and Road River Group Upper Cambrian to Lower Silurian Northeastern British Columbia written by Leanne J. Pyle and published by NRC Research Press. This book was released on 2002 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conodonts, the tiny, phosphatic, tooth-like remains of an extinct group of early vertebrates, are the most important fossil group for biostratigraphy throughout their stratigraphic range from Late Cambrian to Late Triassic. This monograph represents a benchmark study of these important zonal fossils. The detailed paleontological work not only provides a taxonomic basis for future studies on early Paleozoic conodonts but also focuses on the evolution of conodonts in the early Ordovician, a time of extraordinary adaptive radiation. The taxonomic work provides detailed descriptions and illustrations of 185 species representing 69 genera. Seven new genera and 39 new species are described. The high diversity of taxa across the platform-to-basin transect shows the biogeographic differentiation and spatial ecological partitioning of conodonts through time. The taxonomy permits the refinement to the biostratigraphic zonation within two faunal realms for British Columbia that can be correlated with schemes elsewhere in North America and also internationally.

Download or read book Protopanderodus Conodontata from the Ordovician Road River Group Northern Yukon Territory and the Evolution of the Genus written by Alexander D. McCracken and published by Energy Mines and Resources Canada. This book was released on 1989 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Investigations of conodonts and other fossils from well exposed lower Paleozoic strata in the Cordillera of northern Yukon and western District of Mackenzie provide important information on the depositional and tectonic history of western Canada. This report presents the systematic description of 7 species of the Ordovician conodont genus Protopanderodus from carbonate beds within the predominately fine grained clastic rocks of the Road River Group. In addition, the spatial and temperal distribution of Protopanderodus was compiled to facilitate the interpretation of the paleoecology and evolution of this genus and its phylogenetic relationship with Drepanodus.

Download or read book Upper Canadian to Whiterockian Ordovician Conodont Biostratigraphy of the Upper St George Group Western Newfoundland written by Kathleen Anne Stait and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The St. George Group of western Newfoundland is a sequence of limestones and dolostones deposited on the North American platform margin of the Lower Ordovician Iapetus Ocean. The upper half of this sequence records a shoaling-upwards megacycle of deposition, which is found in the upper Boat Harbour, Catoche and Aguathuna formations. -- Much of this megacycle was sampled for conodonts in order to establish a refined biostratigraphy and to shed light upon lithostratigraphic problems within Catoche and Aguathuna formations. Over 130 core samples from the Daniel's Harbour mine and approximately 110 outcrop samples from localities throughout western Newfoundland yielded approximately 5,000 conodonts. -- In total, 72 species from 43 genera are herein described from the upper megacycle of the St. George Group. Striatodontus n. gen. is described, with S. kakivangus n. sp. and S. carlae (Repetski) both found in the St. George Group. Elements probably forming part of a previously unknown apparatus (?New Genus 1) are described, but remain unnamed. New species are Bergstroemognathus alus, Clavohamulus cavus, Diaphorodus gravelsensis, D. stevensi, Leptochirognathus planus, Parapanderodus aequalis and Rossodus symmetricus. In addition, species of Ansella Fåhraeus & Hunter, ?Erismodus Branson & Mehl, Protoprioniodus McTavish, ?Reutterodus Serpagli, and new species of Scalpellodus Dzik, Variabiliconus Landing et al. and the unnamed new (?) genus remain in open nomenclature pending the availability of more abundant material. -- Seven successive informal conodont assemblages are recognised within the faunal succession. These are based upon morphological changes within species of Parapanderodus Stouge and Diaphorodus Kennedy, and concurrent ranges of a number of species. -- Assemblage I correlates with North American trilobite Zone H, which is equivalent to early Midcontinent Province Fauna E of the North American conodont zonation; coeval Baltic Province conodonts are found in the Prioniodus elegans Zone. Assemblage II may correlate with the Prioniodus elegans Zone and Midcontinent Fauna E. Assemblage III is demonstrably contemporaneous with the Oepikodus evae Zone and with the shelly fossil Zone I of the North American succession, but younger assemblages can only be directly related to North American faunas. Faunas are initially of mixed Midcontinent and Baltic affinity, but shallowing of the depositional environment was accompanied by restriction of Baltic forms from uppermost Catoche and Aguathuna formations. -- Assemblage IV, at approximately the base of the Aguathuna Formation, contains the last occurrence of Oepikodus communis (Ethington & Clark) and conodonts of Canadian age interspersed with species more common within Whiterockian strata (e.g. Tripodus laevis Bradshaw). Conodonts equivalent in age to zones J and K are found in Assemblage IV. All but the longest-ranging Canadian conodonts disappear by Assemblage V, which is the first assemblage completely within the Whiterockian: early Whiterockian species include Pteracontiodus cryptodens (Mound), Diaphorodus gravelsensis n. sp. and D. stevensi n. sp. Assemblage VI, commencing with the incoming of Drepanodus sp. cf. D. gracilis (Branson & Mehl) and consisting of early Whiterockian conodonts, is of limited stratigraphic range. The succeeding Assemblage VII, with Drepanoistodus angulensis (Harris), Scandodus sinuosus Mound and Glyptoconus rectus (Stouge) at the base, later contains a diverse and abundant fauna showing affinity with conodonts correlated with shelly fossil Zone M of the Ibex area. This fauna, which continues several metres into the overlying Table Point Formation, is almost completely of Midcontinent Province aspect. It consists primarily of neurodont and lamellar forms such as Leptochirognathus quadrata Branson & Mehl, Multioistodus subdentatus Cullison, Paraprioniodus costatus Ethington & Clark, Erismodus spp. and several previously undescribed species. -- The upper St. George Group conodont succession is broken at two levels within the Aguathuna Formation: significant hiatuses separate assemblages IV and V, and assemblages VI and VII. The lower hiatus is recognized at the same level across western Newfoundland, but the upper hiatus occcurs at different levels both locally and regionally. This pattern of faunal occurrences is explained with reference to the tectonic setting of the platform margin during deposition of the Aguathuna Formation.

Download or read book Conodonts and Conodont Biostratigraphy of the Joins and Oil Creek Formations Arbuckle Mountains South central Oklahoma written by Jeffrey A. Bauer and published by . This book was released on 2010 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Conodont Biofacies and Provincialism written by David Leigh Clark and published by Geological Society of America. This book was released on 1984 with total page 347 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Great Ordovician Biodiversification Event written by B. D. Webby and published by Columbia University Press. This book was released on 2004 with total page 497 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two of the greatest evolutionary events in the history of life on Earth occurred during Early Paleozoic time. The first was the Cambrian explosion of skeletonized marine animals about 540 million years ago. The second was the "Great Ordovician Biodiversification Event," which is the focus of this book. This is the first book devoted specifically to establishing the global patterns of differentiation of Ordovician biotas through time and space. It provides extensive genus- and species-level diversity data for the many Ordovician fossil groups and presents an evaluation of how each group diversified, with assessments of patterns of change, and rates of origination and extinction.

Download or read book Conodont Biostratigraphy of the Upper Cambrian and Lower Ordovician of North western land South eastern Sweden written by D. S. N. Raju and published by . This book was released on 1974 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bulletin Geological Survey of Canada written by Geological Survey of Canada and published by . This book was released on 1999 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biostratigraphy and Conodont Faunas of Upper Ordovician Through Middle Devonian Rocks Eastern Arctic Archipelago written by Teruya Uyeno and published by . This book was released on 1990 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The lower and middle Paleozoic strata of the eastern Arctic Archipelago change rapidly laterally from thin, shallow-water platform deposits to thicker, deeper water basinal deposits. The difficulty in correlating such strata has been overcome in part through well controlled conodont zonation, and by supplementary dating using palynomorphs and megafaunas. Such precise dating and correlation are essential for success in the search for petroleum and other mineral deposits. The study will also help refine calibration of the geological time scale in other parts of the world." --