Examples of maturely dissected fault scarps 201 



details regarding fault facets and recent scarps in the same neighbor- 

 hood. Louderback ('04,) has given a valuable account of the Humboldt 

 Lake mountains, and Baker ('12, 130) has lately added a study of EJ 

 Paso range, both of these being members of the Great Basin system and 

 both possessing dissected fault scarps on one side. 



McGee ('89, 616) some years ago described the submaturely dissected 

 scarp along the inner border of the Atlantic coastal plain in Maryland. 

 Twenhofel ('12, 20) has lately described a strong scarp on the north- 

 western border of Newfoundland as due to faulting followed by a mod- 

 erate amount of erosion; but his account does not exclude the explana- 

 tion of this feature as a resequent fault-line scarp, here set forth in a 

 later paragraph. 



The broad valley, or graben, of the middle Ehine is inclosed by maturely 

 dissected scarps. The one on the east, forming the western face of the 

 Odenwald and Schwarzwald, is comparatively simple; the western side 

 of the graben, where it forms the eastern slope of the Vosges, is a com- 

 pound scarp, in the sense of being determined by several subparallel step 

 faults. The southeastern scarp of the Erzgebirge is of similar origin. 

 The physiographic description of these dissected scarps has not been car- 

 ried so far as the study of their geological structure. A maturely dis- 

 sected fault scarp, with a young scarp at its base, forms the eastern slope 

 of the Lepini mountains south of Eome and is described in one of my 

 own papers (1900). A number of submaturely or maturely dissected 

 fault scarps are described by Siissmilch ( '10? 344) as limiting the plateau 

 blocks in the southern tableland of New South Wales. Bell ('09) and 

 Cotton ('12, 309) describe a dissected fault scarp, with well defined ter- 

 minal spur facets along the northwest side of Wellington harbor, New 

 Zealand. 



Nearly all these accounts of dissected fault scarps are wanting in de- 

 tails as to visible forms; hence if a scheme for the treatment of forms 

 developed on faulted structures were based inductively on descriptions 

 of actual examples now accessible in geographical and geological articles, 

 it would be far from complete. On the other hand, the details as to dis- 

 sected fault scarp forms already in hand suffice to wan-ant the establish- 

 ment of certain general principles from which various consequences may 

 be deduced, as above set forth; and an observer who has these expectable 

 consequences in mind will be prepared to look keenly at the actual fea- 

 tures of a faulted district, and to make explicit mention of their signifi- 

 cant details in terms suggested by the deductive scheme that he has 

 adopted. It need hardly he said that the scheme must never be allowed 



