






STRUCTURES DUE TO DENUDATION 179 
the same geological series as those by which it is surrounded, 
or they may be overlaid discordantly by the latter (Fig. 
55, I, I. As an inlier is the result of denudation, and due 
Fic. 55.—OUTLIERS (O) AND INLIERS (I) IN CONFORMABLE AND 
: UNCONFORMABLE STRATA, 
simply to the partial removal of overlying rocks, the structure 
is most frequently encountered in valleys and other depres- 
sions. Now and again, however, an inlier appears along the 
back of a denuded anticline, as in the case of the Carboni- 
ferous Limestone of Roman Camp Hill, near Edinburgh 
Fic. 56.—SUMMIT OF AN ANTICLINE FORMING AN INLIER, 
(Fig. 56, 1). Faulting also sometimes accounts for the pres- 
ence of an inlier forming elevated ground. For example, we 
occasionally encounter hills composed of ancient rocks rising 
more or less abruptly out of plains or plateaus consisting of 
younger formations. This is the structure of the “Horst 

FIG. 57.—INLIER RESULTING FROM FAULTING. 
«, schistose rocks; 6, b, younger sedimentary strata; f, f, faults; 
o, outlier of 6; I, inlier of a. 
mountains” of German geologists, the general characters of 
which are shown in Fig. 57. In this case it is obvious that 


