Bioerosion in Late Ordovician and Early Silurian Tropical Carbonate Settings of Anticosti Island, Québec, Canada
Author:
Publisher:
Published: 2001
Total Pages:
ISBN-13:
DOWNLOAD EBOOKRead and Download eBook Full
Author:
Publisher:
Published: 2001
Total Pages:
ISBN-13:
DOWNLOAD EBOOKAuthor: Paul Copper
Publisher: Geological Association of Canada/Mineralogical Association of Canada, Waterloo 1994 Committee
Published: 1994
Total Pages: 69
ISBN-13:
DOWNLOAD EBOOKAuthor: André Desrochers
Publisher:
Published: 1998
Total Pages: 114
ISBN-13:
DOWNLOAD EBOOKAuthor: Geological Association of Canada-Mineralogical Association of Canada. Joint Annual Meeting (1994 : Waterloo, ON)
Publisher:
Published: 1994
Total Pages:
ISBN-13:
DOWNLOAD EBOOKAuthor: Max Wisshak
Publisher: Springer Science & Business Media
Published: 2008-09-20
Total Pages: 501
ISBN-13: 3540775986
DOWNLOAD EBOOKIt has become apparent from the literature that bioerosional processes affect a wide range of biological and geological systems that cross many disciplines among the sciences. This book is dedicated to crossing those traditional disciplinary boundaries to present a united and current perspective on the pattern and process of bioerosion. The book opens with papers on the evolutionary significance of bioerosion. It concludes with a primer on the bioerosion bibliography website.
Author: Pascale Daoust
Publisher:
Published: 2017
Total Pages:
ISBN-13:
DOWNLOAD EBOOKAnticosti 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.
Author: Susan L. Duffield
Publisher: National Library of Canada
Published: 1982
Total Pages:
ISBN-13: 9780315109421
DOWNLOAD EBOOKAuthor: Susan I. Duffield
Publisher:
Published: 1982
Total Pages: 676
ISBN-13:
DOWNLOAD EBOOKAuthor: Steven Wickson
Publisher:
Published: 2010
Total Pages: 230
ISBN-13:
DOWNLOAD EBOOKAuthor: Thomas E. Bolton
Publisher:
Published: 1972
Total Pages: 58
ISBN-13:
DOWNLOAD EBOOKThe six formations detailed on the preliminary geological map of Anticosti Island, Quebec, represent an uninterrupted sequence of nearly flat-lying rocks of Upper Ordovician to Middle Silurian ages. The Upper Ordovician strata, divisible into two formations, Vaureal and Ellis Bay, are persistent, alternating calcareous and argillaceous units, each bearing distinct marine faunal assemblages. These rocks occupy the northwestern one-third of the island. The succeeding Lower and Middle Silurian strata of the Becscie, Gun River and Jupiter Formations are more variable lithological units, the uppermost Chicotte Formation, occurring only along the southern coast of the island, being everywhere a massive, cronoidal limestone. These Silurian formations, of Llandoverian and early Wenlockian ages (Alexandrian and early Niagaran), are highly fossiliferous and divisible into several tentative faunal units. Characteristic fossils from each of the six formations are illustrated in a preliminary fashion and grouped by formation.