Download or read book Integrated High Resolution Chemostratigraphic and Cyclostratigraphic Analysis of the Paleotropical Carbonates Spanning the Ordovician Silurian Boundary at the West End of Anticosti Island Eastern Canada written by Alain Mauviel and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Resolution Chemostratigraphy and Cyclostratigraphy of Lower Silurian Neritic Carbonates from Anticosti Island Quebec Canada written by Matthew Braun and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The storm-dominated paleotropical carbonate succession exposed on Anticosti Island in Eastern Canada represents one of the most complete, thickest, and well-preserved successions in the world spanning the O/S Boundary. This study develops a new high resolution integrated lithostratigraphic, cyclostratigraphic, and chemostratigraphic framework for the upper Hirnantian to lower Telychian (Upper Ordovician to lower Silurian) succession on Anticosti, by examining 4̃50 m of strata from a recent stratigraphic drill core (Martin La Mer), supplemented by 1̃20 m of outcrop, all from the south-central part of the island. Four facies assemblages and three time-specific facies were identified in this succession and can be organized into three orders of superimposed transgressive-regressive cycles. New high resolution isotopic curves were produced by sampling well-preserved bulk micrite at a resolution of 0.5-1.0 m per sample; in total 443 samples were taken from core and 168 from outcrop, corresponding to the Ellis Bay, Becscie, Merrimack, Gun River, Menier, Jupiter and Chicotte formations. Four distinct positive carbon isotope excursions are recognized in the study interval; the upper Hirnantian (+5?), Lower Aeronian (+2?), Upper Aeronian (+6?), and Valgu (+3.5?) excursions. These ?13C excursions accompany lithology, and sea level changes and are likely driven by transitions between humid and arid climate states coupled with ocean changes. Multi-ordered ?18O trends are recognized to occur in association with ?13C trends; long-term and intermediate scale ?18O fluctuations are likely controlled by glacio-eustasy and Silurian climate fluctuations, while high-frequency fluctuations may record an astronomical forcing signal.
Download or read book Carbon Isotope Stratigraphy written by Michael Montenari and published by Academic Press. This book was released on 2020-10-30 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon Isotope Stratigraphy, Volume Five in the Advances in Sequence Stratigraphy series, covers research in stratigraphic disciplines, including the most recent developments in the geosciences. This fully commissioned review publication aims to foster and convey progress in stratigraphy with its inclusion of a variety of topics, including Carbon isotope stratigraphy - principles and applications, Interpreting Phanerozoic d13C patterns as periodic glacio-eustatic sequences, Stable carbon isotopes in archaeological plant remains, Review of the Upper Ediacaran-Lower Cambrian Detrital Series in Central and North Iberia: NE Africa as possible Source Area, Calibrating d13C and d18O chemostratigraphic correlations across Cambrian strata of SW, and much more. Contains contributions from leading authorities in the field Informs and updates on all the latest developments in the field Aims to foster and convey progress in stratigraphy, including geochronology, magnetostratigraphy, lithostratigraphy, event-stratigraphy, and more
Download or read book High Resolution Stratigraphy of the Lower Silurian Rhuddanian Aeronian Paleotropical Neritic Carbonates Anticosti Island Qu bec written by Pascale Daoust and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Anticosti Island, located in Eastern Canada, displays one of the most complete, best exposed, and most fossiliferous carbonate successions spanning the Ordovician-Silurian (O/S) Boundary in the World. This study develops a new high-resolution framework for the post End-Ordovician extinction strata ( ̃260 m thick) exposed in coastal outcrops and recovered from a continuous drill core (La Loutre #1), both located in the western part of the island. In total, eight facies, all associated with a storm-dominated carbonate system, were recognized and organized into a multi-order depositional cycles. A new high resolution isotopic curve with more than 300 data points from well-preserved bulk micrite samples covers the late Hirnantian to Early Aeronian time interval and corresponds to the upper Ellis Bay, Becscie, Merrimack and lower Gun River formations. Two distinct positive carbon isotope excursions are present in the late Hirnantian part of the Ellis Bay Formation (+5?) and in the lower Aeronian part of the Gun River Formation (+2?). These positive isotopic carbon excursions provide a distinctive chemostratigraphic signature for regional and global correlations with other O/S sections. Like the Quaternary ?18O marine signal, our ?18O record is largely coupled with multi-order cyclic facies changes. This study demonstrates the importance of glacio-eustasy following the End-Ordovician glacial maxima as one of the primary factors controlling the stratigraphic architecture of paleotropical neritic carbonates during the Early Silurian.
Download or read book High resolution Carbon Isotope Stratigraphy of the Ordovician Silurian Boundary on Anticosti Island Quebec written by Steven Wickson and published by . This book was released on 2010 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Global Analysis of the Ordovician Silurian Boundary written by Leonard Robert Morrison Cocks and published by . This book was released on 1988 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 The Upper Ordovician Through Middle Silurian of the Eastern Great Basin written by David R. Budge and published by . This book was released on 1980 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Late Ordovician Early Silurian Carbonate Tract of Anticosti Island Gulf of St Lawrence Eastern Canada written by Paul Copper and published by Geological Association of Canada/Mineralogical Association of Canada, Waterloo 1994 Committee. This book was released on 1994 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Application of Integrated High resolution Biochemostratigraphy to Paleozoic Chronostratigraphic Correlation written by Bradley Douglas Cramer and published by . This book was released on 2009 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The stratigraphic record preserves a library of global climate change that allows us to use the past as the key to the present by studying prior examples of the multiple climate states of our planet's history. The cause and affect relationships within the global climate system as well as the triggers and eventual consequences of prior examples of global environmental change are all preserved in the rock record. This global library is well-utilized for records from the recent past but there is diminishing attendance as one moves to the parts of the library containing older and older global environmental records. This is largely due to the difficulty in obtaining, reading, interpreting, and correlating global environmental records from the distant past. The work presented here is from the Silurian Period, including an interval from roughly 440 to 423Ma (Millions of years ago), and demonstrates that it is possible to produce a timescale for an interval hundreds of millions of years ago that nearly matches the resolution of more recent time periods. By producing a Phanerozoic timescale of equal resolution and fidelity throughout, over 500 million years of global environmental history can be brought to bear on our understanding of the modern climate system. Such a goal is decades away however, but this dissertation has begun to show that, at least for some portions of the Silurian, global chronostratigraphic correlation on the order of thousands of years (kyr) is achievable. The integration of high-resolution (often cm-scale) carbonate carbon isotope chemostratigraphy with high-resolution biostratigraphy of conodonts and graptolites as a chronostratigraphic tool, 'biochemostratigraphy', is documented in detail throughout this work which is presented in three parts. The document is divided into sections dealing with the chronostratigraphic potential, the practical application, and the chronostratigraphic consequences of integrated high-resolution biochemostratigraphy. Biochemostratigraphic data from Ohio, Indiana, Kentucky, Tennessee, New York, Nevada, Sweden, the United Kingdom, Estonia, and Latvia are presented including an interval from the Aeronian Stage of the Llandovery Series to the Homerian Stage of the Wenlock Series. New chronostratigraphic charts for the Silurian are provided including the first portion of an orbitally-tuned Silurian timescale as well as potential revisions to Silurian lithostratigraphic terms in use in the American Midcontinent.
Download or read book Regional and Global Chemostratigraphic Correlations of a Late Ordovician Early Silurian Carbonate Shelf in Central Nevada written by Bernardo A. Rios and published by . This book was released on 2013 with total page 186 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 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 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 Late Ordovician and Silurian of the Eastern Great Basin written by David R. Budge and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ordovician Silurian and Middle Devonian Stratigraphy in Northwestern Kentucky and Southern Indiana written by James Elvin Conkin and published by . This book was released on 1992 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Late Ordovician and Silurian of the Eastern Great Basin written by Peter M. Sheehan and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sediment Dynamics and Stratigraphic Architecture of a Lower Silurian Storm dominated Carbonate Ramp Anticosti Island Qu bec Canada written by François Clayer and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The upper Llandovery succession across the Jupiter-Chicotte formational contact on Anticosti Island, Québec, allows us to study the sediment dynamics and stratigraphic architecture of a storm-dominated, carbonate ramp. The Anticosti paleotropical ramp was slowly subsiding and recording significant changes in sea level in a far field glacial setting during the early Telychian. Three facies associations, grouping nine facies, are recognized along the E-W outcrop belt, and from top to bottom as the: (FA-1) encrinitic carbonate facies, (FA-2) mixed siliciclastic and carbonate facies, and (FA-3) non-encrinitic carbonate facies. These mid to outer ramp sediments represent deposition mostly from episodic, high-energy storm events as evidenced by hummocky cross-stratification, large wave ripples, gutter casts, and wave-enhanced sediment-gravity flow deposits. Spatial and temporal changes in siliciclastic content imply basin margin depositional environments in the eastern sections and change in climate regime from arid to humid conditions. The Chicotte deposition marks a major faunal change with the domination of crinoids triggered by increasing siliciclastic supply, rapid sea level fluctuations and change in substrates. The recognition of one major transgressive-regressive (TR) sequence subdivided in distinct meter-scale cycles allows a high resolution E-W correlation. The development of the TR sequence and meter-scale cycles is driven by glacio-eustacy where the main sequence is 4th order (4̃00 Ky) with superimposed meter-scale cycles that are 5th and/or 6th order (1̃00 Ky). Nevertheless, erosional capping surfaces within the more proximal tempestites represent ancient rocky shorelines that developed during forced sea level falls. In order to explain this stratigraphic architecture, a carbonate open-ramp model is proposed with a concave-up profile and a narrow and steep inner ramp in equilibrium with a high-energy coastline.
