392 



H. S. WASHINGTON ISOSTASY AND ROCK DENSITY 



Table ITT. — Average Altitudes of Forty-seven Areas 



2.782 

 2.783 

 2.869 



2.806 

 2.780 

 2.777 



2.778 

 2.856 

 2.812 

 2.771 

 2.753 



2.760 

 2.702 



2.760 

 2.809 

 2.775 

 2.816 

 2.794 



2.783 

 2.752 

 2.797 

 2.828 

 2.790 

 2.830 



2.733 



2.728 

 2.812 



2.750 2.713 



h <5a 



Meters 



1. Earth 700 



2. North America 700 



3. Greenland 980 



4. Ontario and Quebec 100 



5. Alaska 610 



6. British Columbia 1,100 



7. United States 760 



8. New England and 230 



New York. 



9. Appalachia 610 



10. Algonkian region .... 250 



11. Arkansas-Texas 230 



12. Montana 910 



13. Wyoming (Yellow- 1,820 



stone National 

 Park). 



14. Colorado 2,134 



15. Utah-Nevada 1,820 



16. Arizona-New Mexico. 1,520 



17. Oregon- Washington . . 760 



18. California 910 



19. West Indies 250 



20. Mexico and Central 2,000 



America. 



21. South America 580 



22. Andes 1.820 



23. Eastern Brazil 750 



24. British Guiana 125 



25. Europe 300 



26. Great Britain and 100 



Ireland. 



27. France 500 2.764 2.706 



28. Scandinavia 600 2.759 2.720 



29. Norway 700 2.763 2.729 



30. Sweden 500 2.758 2.727 



31. Germany 300 2.814 2.744 



5 W Analyses Altitude references 



2 . 792 2 . 737 5,159 Wagner, 1. Murray 



gives 2,252 feet = 

 686.6 meters. 

 1,709 Wagner, 2. 

 41 Murray. 

 99 Canadian Geological 



Survey maps. 

 24 A. H. Brooks, personal 



communi ca tion . 

 60 Times Atlas. 

 1,351 Gannett. 

 213 Gannett. 



32. Austria -Hungary 



(Tyrol not in- 

 cluded). 



33. Switzerland and Ty- 



rol. 



2.749 

 2.730 

 2.741 



2.739 

 2.805 

 2.759 



2.722 

 2.683 



2.706 

 2.639 

 2.728 

 2.754 

 2.724 

 2.776 

 2.742 



2.732 

 2.700 



2.722 

 2.781 

 2.730 



2.758 



400 2.817 2.744 



188 Gannett, modified. 

 66 Gannett, modified. 

 50 Gannett, modified. 



133 Gannett. 



134 Gannett. 



171 Gannett. 



79 Gannett. 



79 Gannett. 



51 Gannett. 

 175 Gannett. 



82 Murray. 



47 Times Atlas. 



138 Wagner, 2. 



56 Times Atlas. 



20 Times Atlas. 



45 Harrison. 

 1,985 Wagner, 2. 

 171 Times Atlas. 



163 Times Atlas. 

 313 Times Atlas. 

 107 Times Atlas. 

 206 Times Atlas. 

 474 Times Atlas. Compare 



Ratzel. 

 148 Kirchoff, modified. 



1,550 2.784 2.702 219 Times Atlas. 



