The Principles of Stratigraphical Geology

Name: The Principles of Stratigraphical Geology
Author: Marr, J. E. (John Edward)

Marr, J. E. (John Edward)

Geology, Stratigraphic

Transcriber's Note

Emphasized text denoted as _Italic_ and =Bold= respectively.




  Cambridge Natural Science Manuals.
  Geological Series.

  THE PRINCIPLES
  OF
  STRATIGRAPHICAL GEOLOGY


  London: C. J. CLAY AND SONS,
  CAMBRIDGE UNIVERSITY PRESS WAREHOUSE,
  AVE MARIA LANE.
  AND
  H. K. LEWIS,
  136, GOWER STREET, W.C.


  [Illustration]


  Leipzig: F. A. BROCKHAUS.
  New York: THE MACMILLAN COMPANY.
  Bombay: E. SEYMOUR HALE.




  THE PRINCIPLES
  OF
  STRATIGRAPHICAL GEOLOGY


  BY
  J. E. MARR, M.A., F.R.S.
  FELLOW AND LECTURER OF S. JOHN'S COLLEGE, CAMBRIDGE,
  AND UNIVERSITY LECTURER IN GEOLOGY.


  CAMBRIDGE:
  AT THE UNIVERSITY PRESS.
  1898

  [_All Rights reserved._]


  Cambridge:
  PRINTED BY J. & C. F. CLAY,
  AT THE UNIVERSITY PRESS.




PREFACE.


The present work has been written in order that students may gain by
its perusal some idea of the methods and scope of Stratigraphical
Geology. I believe that this idea can be obtained most satisfactorily,
if a large number of the details connected with the study of the
stratified rocks are omitted, and I have accordingly given very brief
accounts of the strata of the different Systems.

The work is intended for use in conjunction with any book which treats
of the strata of the Geological Column at considerable length; some of
these books are mentioned on pages 124, 125.

    J. E. M.

    Cambridge,
    _November, 1898_.




CONTENTS.


                                                                     PAGE
  CHAPTER I.
    Introduction                                                        1

  CHAPTER II.
    Account of the growth and progress of stratigraphical geology       6

  CHAPTER III.
    Nature of the stratified rocks                                     21

  CHAPTER IV.
    The law of superposition                                           31

  CHAPTER V.
    The test of included organisms                                     40

  CHAPTER VI.
    Methods of classification of the strata                            58

  CHAPTER VII.
    Simulation of structures                                           72

  CHAPTER VIII.
    Geological maps and sections                                       84

  CHAPTER IX.
    Evidences of conditions under which strata were formed             97

  CHAPTER X.
    Evidences of conditions under which strata were formed, continued 116

  CHAPTER XI.
    The classification of the stratified rocks                        125

  CHAPTER XII.
    The Precambrian rocks                                             132

  CHAPTER XIII.
    Cycles of change in the British area                              149

  CHAPTER XIV.
    The Cambrian system                                               152

  CHAPTER XV.
    The Ordovician system                                             164

  CHAPTER XVI.
    The Silurian system and the changes which occurred in Britain
      at the close of Silurian times                                  174

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The Principles of Stratigraphical Geology

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