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." --

Download or read book Symposium on Conodont Biostratigraphy written by Walter C. Sweet and published by . This book was released on 1971 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Conodont Biostratigraphy of Middle and Upper Ordovician Rocks in the Ouachita Mountains of Arkansas and Oklahoma written by Diane Marie Krueger and published by . This book was released on 2002 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cambrian through Ordovician rocks in the core of the Ouachita Mountains are comprised of interbedded black shales and sandstones, capped by a banded chert. These units were deposited in deep-water slope and rise environments flanking the North American Platform, and from oldest to youngest are divided into the following formations: Collier Shale, Crystal Mountain Sandstone, Mazarn Shale, Blakely Sandstone, Womble Shale, and Bigfork Chert. This study focuses on refining age determinations for the Middle and Upper Ordovician Blakely Sandstone, Womble Shale, and Bigfork Chert Formations. The recovery of conodonts from thin limestone interbeds within the studied units affords a detailed biostratigraphic subdivision of the sequence. These microfossils permit confident stratigraphic assignment of geographically localized and stratigraphically limited exposures, which have hampered geologic mapping within the region. Additionally, conodonts representing both the North American and the North Atlantic Faunal Provinces have been identified. The faunal differences between the two realms are acute, but many samples from the Ouachitas contain representatives of both provinces. These tie points are extremely important for intercontinental correlation. Over 15,000 identifiable conodonts, isolated from 84 samples, allow considerable biostratigraphic refinement of the formations studied. Limestone clasts in the Blakely Sandstone contain lower Whiterockian species such as " Cordylodus " horridus and Histiodella holodentata . The Womble Shale spans the upper Whiterockian and Mohawkian Series and several conodont zones. Cahabagnathus directus occurs in basal portions of the Womble Shale near Caddo Gap, Arkansas, indicating the base of the formation may be as old as the Eoplacognathus suecicus Zone. Conodonts of the succeeding Pygodus serra Zone have been found in the Womble at many localities, whereas assemblages consistent with those of the younger Pygodus anserinus Zone are encountered less frequently. The upper part of the Womble contains an assemblage in the Amorphognathus tvaerensis Zone. The youngest formation examined, the Bigfork Chert, falls chiefly within the Cincinnatian Amorphognathus ordovicicus Zone.

Download or read book Uppermost Ordovician Through Lower Silurian Conodont Biostratigraphy of the Cape Phillips Formation Cornwallis Island Canadian Arctic Islands written by David Martyn Stuart Jowett and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Lower Silurian conodont biostratigraphy is poorly known and not well correlated with the parallel graptolite biozonation. The Cape Phillips Formation contains a continuous record of sedimentation, and exceptionally well preserved faunas in the unstable shelf region of the Franklinian miogeoclinal succession in the Canadian Arctic Islands and north-west Greenland and affords a rare opportunity to integrate the conodont and graptolite biozonation. Detailed biostratigraphic sampling was completed from the base of the Cape Phillips Formation (Upper Ordovician), over the Ordovician-Silurian boundary, and through the entire Lower Silurian (Llandovery and Wenlock) succession on Cornwallis Island in the Canadian Arctic Islands. A total of 180 4.5 kg, samples were collected, yielding 7,575 conodont elements, from which 59 species representing 29 genera were recognised. One new genus and species are established arom the lower Wenlock. Eleven conodont zones were recognized, 1 of which is new, and 3 of which are modified. Due to the multidisciplinary approach of the fieldwork, the conodont zones are integrated with the detailed graptolite biozonation over the entire interval.

Download or read book Proceedings of the Estonian Academy of Sciences Geology written by and published by . This book was released on 1998-06 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Uppermost Ordovician Through Lower Silurian Conodont Biostratigraphy of the Cape Phillips Formation Cornwallis Island Canadian Arctic Islands written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Lower Silurian conodont biostratigraphy is poorly known and not well correlated with the parallel graptolite biozonation. The Cape Phillips Formation contains a continuous record of sedimentation, and exceptionally well preserved faunas in the unstable shelf region of the Franklinian miogeoclinal succession in the Canadian Arctic Islands and north-west Greenland and affords a rare opportunity to integrate the conodont and graptolite biozonation. Detailed biostratigraphic sampling was completed from the base of the Cape Phillips Formation (Upper Ordovician), over the Ordovician-Silurian boundary, and through the entire Lower Silurian (Llandovery and Wenlock) succession on Cornwallis Island in the Canadian Arctic Islands. A total of 180 4.5 kg, samples were collected, yielding 7,575 conodont elements, from which 59 species representing 29 genera were recognised. One new genus and species are established arom the lower Wenlock. Eleven conodont zones were recognized, 1 of which is new, and 3 of which are modified. Due to the multidisciplinary approach of the fieldwork, the conodont zones are integrated with the detailed graptolite biozonation over the entire interval.

Download or read book Correlation Chart and Biostratigraphy of the Silurian Rocks of Canada written by B. S. Norford and published by . This book was released on 1997 with total page 86 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 Geology of the Innuitian Orogen and Arctic Platform of Canada and Greenland written by H.P. Trettin and published by Geological Society of America. This book was released on 1991 with total page 581 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fourteen chapters discuss regional stratigraphy by time intervals from Precambrian to Quaternary, while other chapters describe the geography, geomorphology, tectonics, geophysical characteristics, and resources of the region. A summary chapter includes geologic maps, structural cross-sections, a geotectonic correlation chart, a gravity map, and a location map for exploration wells in the Arctic Islands and northern Greenland. A wealth of additional information is contained on the nine accompanying plates.

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 A Stratigraphical Index of Conodonts written by A. C. Higgins and published by British Micropalaeontological Society. This book was released on 1985 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geological Survey of Canada Open File 3058 written by and published by Natural Resources Canada. This book was released on with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Geology of Devon Island North of 76 Canadian Arctic Archipelago western Part of Cardigan Strait Map Area Prince Alfred Bay Map Area and Parts of Adjacent Maps NTS 59A B C and 69A D written by Ulrich Mayr and published by . This book was released on 1998 with total page 742 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Earth and Life written by John A. Talent and published by Springer Science & Business Media. This book was released on 2012-06-28 with total page 1104 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume focuses on the broad pattern of increasing biodiversity through time, and recurrent events of minor and major ecosphere reorganization. Intense scrutiny is devoted to the pattern of physical (including isotopic), sedimentary and biotic circumstances through the time intervals during which life crises occurred. These events affected terrestrial, lacustrine and estuarine ecosystems, locally and globally, but have affected continental shelf ecosystems and even deep ocean ecosystems. The pattern of these events is the backdrop against which modelling the pattern of future environmental change needs to be evaluated.

Download or read book Fossil Record 5 written by Robert M. Sullivan and published by New Mexico Museum of Natural History and Science. This book was released on 2016-01-01 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Canadian Journal of Earth Sciences written by and published by . This book was released on 1995 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Revista espa ola de micropaleontolog a written by and published by . This book was released on 2003 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Numero extraordinario" with 1972.