Download or read book On a Trenton Echinoderm Fauna at Kirkfield Ontario microform written by Frank 1848-1927 Springer and published by Legare Street Press. This book was released on 2021-09-09 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Download or read book On a Trenton Echinoderm Fauna at Kirkfield Ontario written by Frank Springer and published by Ottawa, Government printing bureau. This book was released on 1911 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On a Trenton Echinoderm Fauna at Kirkfield Ontario Classic Reprint written by Frank Springer and published by Forgotten Books. This book was released on 2018-09-13 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from On a Trenton Echinoderm Fauna at Kirkfield, Ontario Fairly well represented, es in the Toronto University col lection. The species was det r from the upper part of the Trenton at Montreal, and afterwards figured and redescribed by W. R. Billings, from a Specimen found at Division Street, Ottawa. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book Contributions to the Ordovician Paleontology of Kentucky and Nearby States written by John Pojeta (Jr.) and published by . This book was released on 1979 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mollusks Recent and Pleistocene written by William Healey Dall and published by . This book was released on 1919 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book STUDY OF CERTAIN MINERALS FROM COBALT ONTARIO written by H. V. ELLSWORTH and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evolution and Classification of Paleozoic Crinoids written by Raymond Cecil Moore and published by Geological Society of America. This book was released on 1943 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preliminary Determination of Epicenters written by and published by . This book was released on 2003 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Animal Activities written by Nathaniel Stowers French and published by . This book was released on 1902 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fossil Crinoids written by Hans Hess and published by Cambridge University Press. This book was released on 2002 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: Crinoids have graced the oceans for more than 500 million years. Among the most attractive fossils, crinoids had a key role in the ecology of marine communities through much of the fossil record, and their remains are prominent rock forming constituents of many limestones. This is the first comprehensive volume to bring together their form and function, classification, evolutionary history, occurrence, preservation and ecology. The main part of the book is devoted to assemblages of intact fossil crinoids, which are described in their geological setting in twenty-three chapters ranging from the Ordovician to the Tertiary. The final chapter deals with living sea lilies and feather stars. The volume is exquisitely illustrated with abundant photographs and line drawings of crinoids from sites around the world. This authoritative account recreates a fascinating picture of fossil crinoids for paleontologists, geologists, evolutionary and marine biologists, ecologists and amateur fossil collectors.
Download or read book The Great Ordovician Biodiversification Event written by Barry D. Webby and published by Columbia University Press. This book was released on 2004-04-14 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. During the 46-million-year Ordovician Period (489–443 m.y.), a bewildering array of adaptive radiations of "Paleozoic- and Modern-type" biotas appeared in marine habitats, the first animals (arthropods) walked on land, and the first non-vascular bryophyte-like plants (based on their cryptospore record) colonized terrestrial areas with damp environments. This book represents a compilation by a large team of Ordovician specialists from around the world, who have enthusiastically cooperated to produce this first globally orientated, internationally sponsored IGCP (International Geological Correlation Program) project on Ordovician biotas. The major part is an assembly of genus- and species-level diversity data for the many Ordovician fossil groups. The book also presents an evaluation of how each group diversified through Ordovician time, with assessments of patterns of change and rates of origination and extinction. As such, it will become the standard work and data source for biotic studies on the Ordovician Period.
Download or read book Thesaurus Siluricus written by John Jeremiah Bigsby and published by . This book was released on 1868 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Middle Ordovician Crinoids from Southwestern Virginia and Eastern Tennessee written by James C. Brower and published by . This book was released on 1974 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes the crinoid fauna of the Benbolt and allied formations of eastern Tennessee and southwestern Virginia. One new genus and 14 new species are proposed. These are Ectenocrinus punctalus, n. sp., anulocrinus latus, n. sp., Ristnacrinus ? altobasalis, n. sp., Hybocrinus punctatocristatus, n. sp., H. perperamnominatus, n. sp., Palaeocrinus planobasalis, n. sp., P. avondalensis, n. sp., Carabocrinus stellifer, n. sp., C. micropunctatus, n. sp., Pararchaeocrinus convexus, n., sp., Paradiabolocrinus irregularis, n. gen., n. sp., P. sinuorugosus, n. gen., n. sp., Rhaphanocrinus simplex, n. sp., and Wilsonicrinus culmensiuosus, n. sp. Due to poorly preserved material, two new species are not formally described but are referred to Isotomocrinus and Diabolocrinus. Two previously described species, Archaeocrinus peculiaris Miller and Gurley and Geraocrinus sculptus Ulrich, are treated here. The crinoid proposed by Miller and Gurley as Indianocrinus punctatus is a broken hybocrinid with some plates missing; consequently, Indianocrinus is placed in synonymy with Hybocrinus and the species retained as H. punctatus (Miller and Gurley). The pores of the Tennessee and Virgina palaeocrinids are shown to be respiratory; in addition, the ontogeny of the pores is discussed. Diabolocrinus vesperalis (White) is considered a highly variable form which includes six previously erected "species". As indicated in the above tabulation, the fauna is dominated by archaeocrinids, hybocrinids, and peculiar dicyclic cyathocrinid inadunates. The greatest faunal affinities are with the Chazyan crinoids of New York and adjacent areas and with the presumably specialized crinoids (e.g., Ristnacrinus, Hybocrinus, Carabocrinus, and Palaeocrinus) suggests that Late Chazyan and Black River time was an epoch of evolutionary experimentation for crinoids. Three of the peculiar genera survived the Black River, and persisted into the Trenton of North America, but they all became extinct prior to the Upper Ordovician. Most of the Benbolt and allied formation genera which failed to survive after the Black River epoch in North America are "normal" crinoids such as Anulocrinus, Pararchaeocrinus, Paradiabolocrinus, and Diabolocrinus. Reconstruction of the environment of the crinoids suggests that they were rooted in a relatively soft substrate and lived in shallow water of normal marine salinity and high oxygen content which was alternatingly agitated and calm. Agitated conditions probably prevailed as most species show structures which are best interpreted as adaptations to rough water conditions. The only crinoids which do not exhibit such adaptations are Geraocrinus sculptus Ulrich, two Palaeocrinus species, and Rhaphanocrinus simplex, n. sp.
Download or read book Monograph 1 written by Illinois State Geological Survey and published by . This book was released on 1914 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Unfolding the Geology of the West written by Stephen M. Keller and published by Geological Society of America. This book was released on 2016-09-20 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Sixteen geologic field guides explore areas in Colorado, New Mexico, Utah, and Montana"--
Download or read book The Subsurface Paleozoic Stratigraphy of Southern Ontario written by Derek K. Armstrong and published by . This book was released on 2010 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report for the year 1856 1863 64 written by Morrison Education Society (HONGKONG) and published by . This book was released on 1857 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
