CONTENTS 



Preface Page 



Chapter 1. Introduction 



What fossils are 



Where fossils are found 



Uses of fossils 



How fossils are found 



Where and how to collect 2 



Kinds of fossil preservation 2 



How fossils are named 3 



Classification and identification 4 



Use of keys 4 



Technical terms 5 



Name changes 5 



Cleaning and preparation 5 



Cataloguing 6 



Basic references 6 



Chapter 2. The story of Ohio's rocks 8 



General 8 



Classification of Ohio's rocks 13 



Pre-Cambrian time: the beginning 13 



Cambrian time: the age of trilobites 14 



Ordovician time: the age of bryozoan reefs 14 



Silurian time: the rise of the corals 17 



Devonian time: the rise of the fishes 19 



Mississippian time: the great sandy deltas 21 



Pennsylvanian time: the coal forests 23 



Permian time: the end of the seas in Ohio 26 



The great gap in the record 26 



Pleistocene time: the glaciers 26 



Chapter 3. The main kinds of fossils 29 



The Plant Kingdom 29 



General 29 



Phylum Thallophyta 29 



Phylum Bryophyta 30 



Phylum Pteridophyta 30 



Phylum Arthrophyta 31 



Phylum Lepidophyta 31 



Phylum Pteridospermophyta 31 



Phylum Cycadophyta 31 



Phylum Coniferophyta 32 



Phylum Angiospermophyta 32 



The Animal Kingdom 32 



General 32 



Phylum Protozoa 33 



Phylum Porifera 34 



Phylum Coelenterata 34 



Ul 



