Transcriber’s Note:
The cover image was created by the transcriber and is placed in the public domain.
THE PLEISTOCENE OF NORTH AMERICA AND ITS VERTEBRATED ANIMALS FROM THE STATES EAST OF THE MISSISSIPPI RIVER AND FROM THE CANADIAN PROVINCES EAST OF LONGITUDE 95°.
BY
OLIVER P. HAY
Associate of the Carnegie Institution of Washington
Published by the Carnegie Institution of Washington, February, 1923
CARNEGIE INSTITUTION OF WASHINGTON
Publication No. 322
TECHNICAL PRESS
WASHINGTON, D. C.
III
CONTENTS
| PAGE | ||
|---|---|---|
| Preface | VII–VIII | |
| Conclusions regarding the divisions of the Pleistocene | 1–15 | |
| Limits of the Pleistocene | 1 | |
| The Blanco Pliocene | 1 | |
| Divisions of the Pleistocene | 2 | |
| Elevation of Continent | 3 | |
| Connections of North America with South America and Asia | 3 | |
| Sources of vertebrates | 4 | |
| Richness of Pleistocene life | 4 | |
| Evolution during the Pleistocene | 5 | |
| Extinction of species | 6 | |
| The earliest Pleistocene, the Nebraskan | 7 | |
| The Aftonian interglacial | 10 | |
| The Yarmouth interglacial | 12 | |