314 APPENDIX 



TABLE OF STRATIFIED EOCKS Continued 



The total is 117,500 feet. Estimates in years of geological time, 

 often given in Newspapers, are quite misleading. No geologist can 

 say how many years ago the Eocene, or any other period, began. We 

 only know that over 100,000 feet of rocks have been deposited ; and, 

 by taking a rough average (1 foot in 1000 years), we get as the result 

 of multiplying 100 million years. But this is only a very rough estimate. 

 The world may be much older than that, it can hardly be less since 

 geological time began. 



