ZOOGENESIS 





the fossil sediments in a continuous series from the 

 very earliest to those now forming. We can tell 

 with great exactness the relative age of any fossil 

 bearing rock in reference to other fossil bearing rocks 

 elsewhere. 



By studying the various fossils in formations of 

 different ages we are able to compare the animals of 

 one period with those of another and thereby to form 

 a picture of the ever changing aspect of animal life 

 as it has existed on the earth. 



Table Showing the Sequence of Geological Time 



[99] 



