DEMONSTRATION MATERIAL IN GEOLOGY 75 



2. Several models of mountains of the "thick-shelled" type, such as 

 the Eocky Mountains. 



3. A model showing a section across the Sierra Nevada. 



4. One of the Coast Ranges. 



5. One of the Ozarks. 



6. Two of the Black Hills; one a generalized section of the whole 

 mountain mass and the other a detailed section of the central crystalline 

 mass. 



7. A model showing a section across the basin of Mexico City. 



8. A model showing a section across the Rocky Mountains at Banff. 



9. One of the eastern townships of Quebec, showing a section across 

 the Monteregian Hills (splendid residual mountain cores). 



10. A model of the Bannock overthrust. 



11. An accurate model of the Karst regions of Florida and Dalmatia, 

 showing especially underground structures. 



12. An east-and-west section across the Hudson Valley, near Xew York 

 City, and including the Palisades. 



13. A model in which piedmont foldings and intrusions are well shown. 



14. A model of the Cincinnati anticline. 



15. A model which shows the geological section of a narrow strip of 

 country across the Mohawk River from the Adirondacks to the Catskills. 



16. Models, with sections, of the Great Plains of the United States. 



17. A model of a coastal plain to show cuestas and the varying thick- 

 ness of the coastal plain formations, such as are well illustrated in parts 

 of Alabama, Mississippi, and Texas. 



18. Models showing the structure of the Green and White Mountains, 

 if any one has the knowledge or courage to attempt them. 



19. A model of the complex structure of the Lake SuperioT region. 



20. Fine geological models of our national parks should be on ex- 

 hibition in all of the parks, and class-room models should be made avail- 

 able. It is a fortunate circumstance that our national parks, though 

 chosen for the most part without regard to their geological structure, 

 furnish, nevertheless, excellent examples of diverse geologic and physio- 

 graphic types. 



Other models will doubtless suggest themselves. 



Relief Maps 



source of supply 



So many relief maps have already been constructed by museums, geo- 

 logical surveys, universities, and colleges that space will not permit of 



