MOUNTAINS AND PLATEAUS 369 



later (p. 519), but it should be noted in this connection that the time 

 at which a region was raised above the sea was, at least, not previous 

 to the youngest rocks of which the region is composed. For example, 

 the Appalachian Mountains contain coal beds which show that the 

 region was folded after their formation, i.e., after the Carboniferous 

 (P- 477). 



REFERENCES FOR MOUNTAINS 



Daly, R. A., — Abyssal Igneous Injection as a Causal Condition and as an Effect of 



Mountain-building : Am. Jour. Sci., Vol. 22, 1906, pp. 195-216. 

 Daly, R. A., — Mechanics of Igneous Intrusion: Am. Jour. Sci., Vol. 15, 1903, pp. 



269-298; Vol. 16, 1903, pp. 107-126. 

 Daly, R. A., — Igneous Rocks and their Origin. 

 Geikie, J., — Mountains ; their Origin, Growth, and Decay. 

 Geikie, A., — Textbook of Geology, 4th ed., Vol. 1, pp. 672-702. 

 Gilbert, G. K., — Report on the Geology of the Henry Mountains: U. S. Geol. and 



Geog. Surv. of the Rocky Mountain Region, 1877. 

 Reade, T. M., — Origin of Mountain Ranges. 

 Tarr and Martin, — College Physiography, pp. 525-581. 

 Willis, B., — The Mechanics of Appalachian Structure: Thirteenth Ann. Rept., U. S. 



Geol. Surv., Pt. 2, pp. 217-281. 



Topographic Map Sheets, U. S. Geological Survey, Illustrating Mountains 



of Various Origins 



Folded Mountains 



Delaware Water Gap, Pennsylvania. Estillville, Kentucky. 



Harrisburg, Pennsylvania. Fort Payne, Alabama. 



Hollidaysburg, Pennsylvania. Tamalpais, California. 



Residual Mountains Fault Mountains Laccolith Mountains 



Kaaterskill, New York. Alturas, California. Henry Mts., Utah. 



Mt. Mitchell, North Carolina. Granite Range, Nevada. 

 Monadnock, New Hampshire. 

 Wausau, Wisconsin. 



