V CONTENTS. 



III. MESOZOIC TIME— (continued). PAGB 



3. Cretaceous Period ,„., 467 



1. American „ 467 



2. Foreign 479 



3. General Observations 488 



4. General Observations on the Reptilian Age 493 



1. Time-Ratios 493 



2. Geography 493 



3. Life 494 



5. Disturbances during and at the close of the Rep- 



tilian Age 502 



IV. CENOZOIC TIME 505 



Mammalian Age 505 



1. Tertiary Period 506 



1. American 506 



2. Foreign 522 



General Observations 530 



2. Post-Tertiary Period 535 



1. Glacial Epoch 535 



1. American 535 



2. Foreign 540 



3. Fiords 541 



4. General Observations 541 



2. American Champlain Epoch 547 



3. American Terrace Epoch 554 



4. Foreign Champlain and Terrace Epochs 558 



5. Life of the Post-Tertiary 558 



6. General Observations on the Post-Tertiary 567 



General Observations on the Cenozoic 568 



1. Time-Ratios 568 



2. Geography 568 



3. Life 571 



V. ERA OF MIND— AGE OF MAN 573 



1. Rocks and Life 574 



2. Changes of Level 586 



VI. General Observations on Geological History 590 



1. Length of Geological Time 590 



2. Geographical Progress in North America 592 



3. Progress of Life 592 



1. System in the Progress of Life 592 



2. Relations of the Progress to the Physical History of 



the Globe 600 



