The Foitnders of Geology 



LECTUKE VI 



PAGE 



The Transition or Greywacke formation resolved by Sedgwick and 

 Murchison into the Cambrian, Silurian and Devonian systems 

 The pre-Cambrian rocks first begun to be set in order by 

 Logan Foundation of Glacial Geology, Agassiz Rise of 

 modern Petrography ; "William Nicol, Henry Clifton Sorby 

 The influence of Lyell and Darwin Conclusion . . . 242 



