78 
OROGENY AND EARTH’S ROTATION 
of the relations of the continents and the oceanic basins. A direct 
effect of this broader perspective permitted by the new view-angle 
is the notable loss of force which is sustained by the idea of the 
permanency of the continental masses, as urged by the late J. D. 
Dana, and so strongly advocated by others. In this regard it 
seems that the continental borders have to be reexamined with this 
Figure 7. Beginning of the Basinal Infold 
circumstance in mind. It is possible that secular continental mi¬ 
gration shall have to be substituted for permanency of the larger 
earth features. 
The constant recurrence of the simple monocline in the labora¬ 
tory tests suggests its careful analysis as a fundamental structural 
feature. Radial measurements clearly show that the phenomenon' 
is not merely and entirely a local down-sinking. With reference 
to the normal circumference of the spheroid the movement in¬ 
volves a noteworthy rising on the up-side of the monocline and 
for a considerable distance beyond the crest; and a differential 
depression for a long distance on the down-side, beyond the foot 
of the incline. There is, then, a gradual rise of the stratigraphic 
level until finally the latter again reaches its normal level with 
reference to the circumference. (Figure 8). 
Figure 8. Origin of the Monoclinal Flexures 
In the field, and especially in such regions as the Great Basin, 
where the monoclinal type of fold is rendered so conspicuous, the 
laboratory results appear to be notably applicable. A not in¬ 
significant fact is the general meridional trend of the monoclinal 
