TRILOBITES
OF THE
COBOURG FORMATION
CD-ROM

Systematics and Paleoecology of Trilobites from the Cobourg Formation (Upper Ordovician), southern Ontario, Canada

$45.00 Cdn./U.S. (Free Shipping)

    This is the most comprehensive work dealing with trilobites in the Cobourg Formation of Ontario, Canada! It is finally ready to be released here on CD-ROM at a special price. The work consists of 210 pages with numerous illustrations. It is a pdf file which can be opened in Adobe Acrobat Reader. The pdf can be saved to your computer and can be printed for your personal library ... make sure you have at least 210 sheets of 8 1/2" x 11" paper for your printer. Please remember that this work is original and protected by copyright ... it may not be distributed to others in any form (personal use only).
    Twenty-six trilobite species are documented and described. Their occurrences within the Cobourg Formation are detailed as well as their associations with other non-trilobite fossil species. Detailed information about lithology and stratigraphy is covered. You will find this invaluable as it provides locality information along with the stratigraphy. Paleoenvironmental and paleoecological interpretations as they pertain to the trilobite species make this a must have book for collecting the numerous species of this formation. As you can see from the contents below ... this work covers it all!
   Also see pic below of the CD-ROM you will receive and scaled down sample pics of some illustrations.

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TABLE OF CONTENTS

ABSTRACT

INTRODUCTION

MATERIALS AND METHODS

ENVIRONMENTAL SEDIMENTOLOGY OF THE COBOURG FORMATION
        Micrites and Biomicrites
        Biosparites
        Calcareous Shales

PALEONTOLOGY AND PALEOECOLOGY OF THE COBOURG FORMATION
        Ichnofossil Association
        Streptelasma-Dinorthis Association
        Ceraurus-Echinoderm Association
        Brachiopod Association
        Endoceras-Isotelus latus Association
        Gastropod Association
        Onniella-Pseudogygites Association
        Discussion

ENVIRONMENTAL MODEL FOR DEPOSITION OF THE COBOURG FORMATION

DISTRIBUTION AND PALEOECOLOGY OF TRILOBITES FROM THE COBOURG FORMATION

AGE AND CORRELATION OF THE COBOURG FORMATION

SYSTEMATIC PALEONTOLOGY
Family Remopleurididae
Family Asaphidae
Family Illaenidae
Family Otarionidae
Family Dimeropygidae
Family Harpidae
Family Cheiruridae
Family Encrinuridae
Family Calymenidae
Family Pterygometopidae
Family Lichidae
Family Odontopleuridae

CONCLUSIONS

LITERATURE CITED

LIST OF TABLES

       Table I. Relative abundance (percentage) of trilobite families found at selected localities and stratigraphic positions in the Cobourg Formation

LIST OF ILLUSTRATIONS

Figure 1.   Map showing distribution of the Cobourg Formation and collecting localites in southern Ontario
Figure 2A.  Generalized stratigraphic section of Middle-Upper Ordovician strata in southern Ontario
Figure 2B.  Stratigraphic section of the Cobourg Formation
Figure 3.  Photo showing gradation between Verulam Formation and Hallowell Member
Figure 4. Photo showing contact between Hallowell and Hillier Members
Figure 5.  Photo showing contact between lower and upper units of the Hillier Member
Figure 6.  Photo showing contact between Hillier Member and Whitby Formation
Figure 7.  Photo showing laminated coarse micrite
Figure 8.  Photo of biomicrite mudstone bed in terrigenous mud
Figure 9.  Photo showing exposure of nodular micrite
Figure 10.  Detail of cycle containing nodular micrite
Figure 11.  Photo of polished slab of nodular micrite
Figure 12.  Photo of well preserved crinoids from nodular micrite
Figure 13.  Photomicrograph of thin section of coarse biosparite
Figure 14.  Photo of biosparite bed infilling channels
Figure 15.  Photo of ripples in biosparite
Figure 16.  Photo of polished slab of ripple crest (biosparite)
Figure 17.  Photo of fresh surface of ripple consisting of biosparite
Figure 18.  Photo of coarse micrite bed with vertical burrows
Figure 19.  Photo of bedding surface of Planolites burrows
Figure 20.  Reconstruction of Streptelasma-Dinorthis Association
Figure 21.  Reconstruction of Ceraurus-Echinoderm Association
Figure 22.  Photo of bedding plane with "pavement" of the brachiopod Rafinesquina alternata
Figure 23.  Reconstruction of Endoceras-Isotelus latus Association
Figure 24.  Block model of paleoenvironments which occurred during the deposition of the Cobourg Formation
Figure 25.  Range chart showing distribution and relative abundance of trilobites in the Cobourg Formation
Figure 26.  Pie graphs showing relative abundance of most common trilobite species at selected localities and stratigraphic intervals
Figure 27.  Correlation chart of upper Middle and Upper Ordovician formations in eastern and central North America
Figure 28.  Exoskeletal reconstruction of Hypodicranotus striatulus (Walcott, 1875)
Figure 29.  Exoskeletal reconstruction of Isotelus mafritzae Rudkin and Tripp, in preparation
Figure 30.  Exoskeletal reconstruction of Isotelus latus Raymond, 1913
Figure 31.  Exoskeletal reconstruction of Pseudogygites latimarginatus (Hall, 1847)
Figure 32.  Exoskeletal reconstruction of Illaenus americanus Billings, 1859
Figure 33.  Exoskeletal reconstruction of Nanillaenus beatrice n.sp.
Figure 34.  Exoskeletal reconstruction of Failleana indeterminata (Walcott, 1877)
Figure 35.  Exoskeletal reconstruction of Ceraurinus remus n.sp.
Figure 36.  Exoskeletal reconstruction of Ceraurinus marginatus Barton, 1913
Figure 37.  Exoskeletal reconstruction of Ceraurus milleranus Miller and Gurley, 1893
Figure 38.  Exoskeletal reconstruction of Ceraurus matranseris Sinclair, 1947
Figure 39.  Exoskeletal reconstruction of Ceraurus pleurexanthemus Green, 1832
Figure 40.  Exoskeletal reconstruction of Leviceraurus mammilloides Hessin, 1988
Figure 41.  Exoskeletal reconstruction of Flexicalymene senaria (Conrad, 1841)
Figure 42.  Exoskeletal reconstruction of Flexicalymene croneisi (Roy, 1941)
Figure 43.  Exoskeletal reconstruction of Calyptaulax callicephalus (Hall, 1847)

PLATE 1.
Figures 1-7.  Hypodicranotus striatulus (Walcott, 1875)
Figures 8, 9.  Isotelus mafritzae Rudkin and Tripp, in preparation
PLATE 2.
Figures 1-4.  Isotelus mafritze Rudkin and Tripp, in preparation
Figures 5-7.  Isotelus latus Raymond, 1913
PLATE 3.
Figures 1,2.  Isotelus latus Raymond, 1913
Figures 3-7.  Pseudogygites latimarginatus (Hall, 1847)
PLATE 4.
Figure 1.  Pseudogygites latimarginatus (Hall, 1847)
Figure 2.  Anataphrus sp.
Figures 3-8.  Illaenus americanus Billings, 1859
PLATE 5.
Figures 1-6.  Nanillaenus beatrice n.sp.
PLATE 6.
Figures 1-8. Nanillaenus beatrice n.sp.
Figures 9, 10. Failleana indeterminata (Walcott, 1877)
PLATE 7.
Figures 1, 2. Otarion laurentinum Stauble, 1953
Figure 3.  Dimeropyge sp.
Figure 4.  Paraharpes ottawaensis (Billings, 1865)
Figures 5, 6.  Ceraurinella trentonensis (Barton, 1913)
Figures 7, 8.  Ceraurinus remus n.sp.
PLATE 8.
Figures 1, 2. Ceraurinus remus n.sp.
Figures 3-8.  Ceraurinus marginatus Barton, 1913
PLATE 9.
Figures 1-3.  Ceraurus milleranus Miller and Gurley, 1893
Figures 4, 5.  Ceraurus matranseris Sinclair, 1947
Figure 6.  Ceraurus sp.
PLATE 10.
Figures 1-4.  Ceraurus pleurexanthemus Green, 1832
Figures 5-8.  Leviceraurus mammilloides Hessin, 1988
Figures 9-11.  Encrinuroides cf. pernodosus (Slocom, 1913)
PLATE 11.
Figures 1-5.  Flexicalymene senaria (Conrad, 1841)
Figures 6-13.  Flexicalymene croneisi (Roy, 1941)
PLATE 12.
Figures 1-3.  Calyptaulax callicephalus (Hall, 1847)
Figures 4, 5.  Sceptaspis lincolnensis (Branson, 1909)
Figures 6, 7.  Amphilichas sp.
Figure 8.  Primaspis trentonensis (Hall, 1847)

LIST OF APPENDICES

    Appendix I.  Register of localities and general stratigraphic information
    Appendix II.  Faunal list for the Cobourg Formation
    Appendix III.  Quadrat data for various exposures of the Cobourg Formation
    Appendix IV.  Tabulation of number of individuals and relative abundance (percentage) of trilobite species occurring at selected localities and stratigraphic positions in southern Ontario

ORDER FORM

Payable by Check or International Money Order to William Hessin.
Mail to:
William A. Hessin
9214 Danforth Road East
Cobourg, Ontario
K9A 4J8   Canada
For inquiries email: geo-biologist@hotmail.com

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