54 



IOWA ACADEMY OF SCIENCES. 



general section north to south is represented in the subjoined 

 cut (figure 4) : 



Figure 4. North and South Section of the Crimea. 



In another direction, that is parallel to the shore and the 

 long axis of the Black sea, the section appears as in the sketch 

 below (figure 5), in which the old peneplain surface (A-G) 



• Figure 5. East and West Section of a Part of the Crimea. 



seems to pass beneath the Tertiary deposits to {D) where it 

 disappears below sea level. The Cretaceous eruptives (G) all 

 have the appearance of being completely planed off. The dis- 

 tance represented by the section is fully a dozen miles, and it 

 is all plainly visible from the sea at one time. 



The region was peneplained in early Tertiary times, and 

 then uplifted, with a maximum uprising near the present shore- 

 line. This peneplain still retains numerous traces of its exist- 

 ence. With the uplifting was inaugurated the present cycle of 

 erosion which has been somewhat accelerated by very late ele- 

 vation. The dry climate has prevented a rapid softening of 

 the relief. 



