DEFINITIONS OF TERMS 215 



be framed, but they would not meet the object desired, which is to de- 

 scribe the fault forms in their natural association with neighboring 

 forms, all treated in relation to the stage of their development in one or 

 more cycles of erosion, following some appropriate and systematic scheme 

 of general application, the scheme here adopted being that of "structure, 

 process, and stage." It is impossible to apprehend this manner of de- 

 scribing fault forms merely from definitions of terms ; but after the 

 manner of description has been learned, as from the foregoing discussion, 

 it would be an easy matter to define all the terms regarding such forms 

 in compact statements, which might be easily carried in mind after their 

 useful meaning has been apprehended. Any one may make these defini- 

 tions if he wishes to. I have refrained* from so doing, even at the end of 

 this essay, for fear that some readers might use the definitions as a short 

 cut to a supposed understanding of the problems involved, and thus place 

 the cart before the horse, the terms before their need and their meaning. 



Eeferences 



(t. Andersson : Om Malartrakternas Geografi. I. Malartrakernas Naturgeo- 



grafi. Yiner, 1903, pp. 1-64. 

 C. L. Baker: Physiography and structure of the western El Paso range and 



the southern Sierra Nevada. Univ. Calif. Bull. Geol., vol. vii, 1912, pp. 



117-142. 

 W. C. Brogger : Ueber die Bildungsgeschichte des Christiania-f jord. Xyt Mag. 



f. Naturvidensk., vol. xxx, 1886, pp. 99-231. 

 M. R. Campbell: Drainage modifications and their interpretation. Journ. of 



Geol., vol. iv, 1896, pp. 567-581, 657-678. 

 T. C. Chamberlin and R. D. Salisbury : Preliminary paper on the driftles 3 



area of the upper Mississippi Valley. Sixth Ann. Rept. U. S. Geol. Surv., 



1885, pp. 199-322. 

 C. A. Cotton : Recent and subrecent movements of uplift and of subsidence 



near Wellington, New Zealand. Scot. Geogr. Mag., vol. xxvii, 1912, pp. 



306-312. 

 H. P. Cushing : Geology of the vicinity of Little Falls, Herkimer County. 



New York State Museum Bull. 77, 1905. 

 N. II. Darton : A preliminary description of the faulted region of Herkimer, 



Fulton, Montgomery, and Saratoga* counties. New York State Museum, 



48th Ann. Rept. of the Regents, vol. ii, 1895, pp. 33-56. 

 W. M. Davis : The faults in the Triassic formation near Meriden, Connecticut. 



Bull. Mus. Comp. Zool.. vol. xvi, 1889, pp. 61-87. 

 : The Triassic formation of Connecticut. Eighteenth Ann. Rept. U. S. 



Geol. Surv., 1898, pt. ii, pp. 1-192. 

 : Faultscnrp in the Lepini Mountains, Italy. Bull. Geol. Soc. Ahum-.. 



vol. 11, 1900, pp. 207-216. 

 ■ : An excursion to the Grand canyon of the Colorado. Bull. Mus. Comp, 



Zool., vol. xxxviii, 1901, pp. 107-201. 

 : a, An excursion to the plateau province of Utah and Arizona. Ibid., 



vol. xlll, 1903, pp. 1-49. 



