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 The Cumulative Book Index written by and published by . This book was released on 1912 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book On a Trenton Echinoderm Fauna at Kirkfield Ontario microform written by Geological Survey of Canada and published by . This book was released on 1911 with total page 75 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 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 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 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 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 The Devonian of Southwestern Ontario written by Clinton Raymond Stauffer and published by . This book was released on 1915 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Soils in Canada written by Royal Society of Canada and published by . This book was released on 1965 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Ordovician Earth System written by Stanley Charles Finney and published by Geological Society of America. This book was released on 2010-01-01 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Ordovician period is a significant chapter in Earth's history that included the great Mid-Ordovician biodiversification event, the Hirnantian glaciation, and long-term greenhouse conditions. Ordovician rocks are widespread on most continents and the recent finalization of a modern chronostratigraphic classification of the Ordovician system now facilitates high-resolution correlations that allow for integrated multidisciplinary research. The diverse papers comprising this volume address orogenesis, paleogeography, climate modeling, sedimentation, biodiversity, and isotopic excursions; together they promote an integrated view of the Ordovician earth system."--Publisher's description.

Download or read book Report of Progress from Its Commencement to 1863 written by Geological Survey of Canada and published by . This book was released on 1863 with total page 1026 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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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: